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Nature Observations

Norfolk Naturalist Year in Photos, (Dec 2023-Nov 2024)

Thistle Tortoise Beetle (Cassida rubiginosa), Backyard, May 2024:

Tortoise Beetles (Beetles in the subfamily Cassidinae of the Family Chrysomelidae) have always been some of my favourite insects. Their wide elytra (wing-covers) protect their limbs and heads from predators and provide them with an appealingly round shape. The Thistle Tortoise Beetle is not native to Canada (having been introduced to combat the non-native Thistle plant), but it was still exciting to spot this charismatic insect on my back porch, trundling along. Their larval stage is less appealing, but still interesting, protecting itself not with a hardened armor covering but a “fecal parasol”. Yes, that’s right, larval Tortoise beetles carry their poop within a forked abdomen curved forward over their backs to ward off predators. There is even a specific word for this behaviour: “merdigery” – from the Latin for “dung” and “carry” (Costa 2006). Likely not a word you’ll find too much use for.

Armored Resin-bee (Heriades), Backyard, June 2024:

This strange-looking bee lays its eggs inside of constructions left behind by other insects, “especially beetle holes in wood, but they may also use pine cones” according to Wilson and Carril (2016). Their nest cells are divided with resin which is where they get their common name of “resin-bee”. Their generic name “Heriades” means “wool” referring to their woolly hairs, evident in the photo.

Related Chaclid Wasp (Leucospis affinis), Backyard, June 2024:

Although her colouration may remind you of a paper wasp or other social, stinging wasp, the long ovipositor curled over her back indicates that she is in fact something quite different: a parasitic wasp. This female will lay her eggs inside the nest of a leafcutter bee (bees in the family Megachilidae), and the larvae that hatch will locate and consume their host bee larvae (Holm 2021). Holm, in her amazingly detailed books on common garden wasps, says this about the larval stage of this wasp: “The larva is initially equipped with sensory and locomotive hairs on its head and body to help it find the host as it moves around the dark nest cell… has an oversized head, and large mandibles used to kill the host larva and destroy any other Leucospis eggs. Like many cleptoparasitic bees, the larva loses most of these prey-finding apparatus after molting” (Holm 2021).

Common Snapping Turtle (Chelydra serpentina), Long Point, June 2024:

The sight of a Snapping Turtle walking across land always makes me think of a prehistoric beast lumbering out of some primeval swamp. Despite the fact that Snapping Turtles are well adapted to their environment, and no more primitive a species than any others, they give the impression of an ancient power, a relic from the days of the lumbering dinosaurs.

Marsh Wren (Cistothorus palustris), Long Point, June 2024:

The sound of these energetic birds clambering among the cattails of a wetland is one of the backdrops of my summer, going out to take photos of birds and other wildlife. I was surprised to learn that Marsh Wrens are major predators on Red-winged Blackbird eggs and nestlings in some parts of their range (Beletsky 1996). Marsh Wrens mostly eat insects, and they construct several nests within their territories from which the females choose, just like in House Wrens (Stokes and Stokes 1983).

Striped Cucumber Beetle (Acalymma vittatum), Backyard, July 2024:

The Striped Cucumber Beetle is considered a pest because it consumes plants that we like to consume ourselves: members of the Cucurbitaceae (cucumbers, watermelons, gourds, pumpkins, squash and many others). The adults feed on leaves, while their larvae feed on the roots (Marshall 2018).

Green Immigrant Leaf Weevil (Polydrusus formosus), Backyard, July 2024:

Another pest beetle species, this one non-native to North America (accidentally introduced, and not deliberately like the Thistle Tortoise Beetle), the Green Immigrant Leaf Weevil feeds on various shrubs and trees. Eggs are laid in the bark of host plants or in the soil, the larvae feed on roots through Spring and Summer and then emerge as adults in the following Spring (Lisak et. al. 2024).

Smiling Mason Wasp (Ancistrocerus campestris), Backyard, July 2024:

In the photo above, you can clearly see the smile emblazoned on the Smiling Mason Wasp’s thorax. These wasps lay their eggs in pre-existing cavities, creating several nest cells by dividing the cavity with mud walls (Holm 2021). You can think of each nest cell as a nursery for individual wasp larvae, as the Smiling Mason Wasp female lays a single egg in each chamber (and hangs it from the ceiling by a silken thread) (O’Neill 2001). Each nursery is filled with several paralyzed caterpillars for the larva to consume upon hatching (Holm 2021).

Squash Vine Borer (Eichlinia cucurbitae), Backyard, July 2024:

Standing still, the illusion is not very convincing, but when this little moth was in constant buzzing motion, hovering from flower to flower, the resemblance to a wasp was impressive (specifically the Great Golden Digger Wasp, Sphex ichneumoneus). The mimicry helps keep this moth safe from predators which hesitate to interfere with a stinging wasp but would love to snack on a harmless moth. As with several other insects on this list, the Squash Vine Borer feeds on squash, cucumbers, gourds, or pumpkin during its larval stage, giving some indication of what we were growing in our garden this past summer.

Pruinose Squash Bee (Peponapis pruinosa), Backyard, July 2024:

Unlike many other bees, Squash Bees are specialist pollinators on one plant family: the Cucurbitaceae (the pumpkins, squash, cucumbers etc). These are solitary bees, meaning that each female creates her own nest for her offspring, rather than contributing to a social construction such as a honeybee or bumblebee colony made up of many non-reproducing individuals. Female Squash Bees dig their nests into the soil, 1.5 feet deep or more, before branching off the main tunnel into several off-shoots with each one receiving pollen and an egg (Wilson and Carril 2016).

Red-Spotted Purple Butterfly (Limenitis arthemis astyanax), Backus Woods, July 2024:

This beautiful butterfly was spreading its wondrous wings as it fed on dung (I believe this was of the horse variety). Many butterflies feed on dung for valuable minerals, creating such jarring juxtapositions.

Three-lined Potato Beetle (Lema daturaphila), Backyard, July 2024:

This attractively coloured beetle is a native leaf beetle (in the subfamily Criocerinae) which feeds on potatoes and other related plants. Its larvae exhibit merdigery (bet you didn’t think that word was coming back again so soon, did you!?).

Swift Feather-legged Fly (Trichopoda pennipes), Backyard, July 2024:

These flies are part of the vast fly Family Tachinidae, which are largely bristly and parasitic. Trichopoda pennipes lays its eggs directly onto its hosts which are various true bugs (Hemipterans), including Squash Bugs, Stink Bugs and Leaf-footed bugs. The egg hatches and the larva burrows directly into the host bug, consuming it from the inside. This gruesome life cycle is helpful to gardeners as many of its hosts are pests of garden plants.

Five-Banded Thynnid Wasp (Myzinum quinquecinctum), Backyard, July 2024:

These large wasps again demonstrate the familiar patterning and colouring of a social paper wasp, but are very distinct in their life cycle. Female Five-Banded Thynnid Wasps dig up to six inches into the ground at night, in search of scarab beetle larvae (or occasionally tiger beetle larvae) (Holm 2021). Once found, the female paralyzes the grub and lays her egg on its abdomen (Holm 2021). The wasp larva consumes the beetle larva and creates a silken cocoon within its late host’s underground chamber to spend the winter (Holm 2021). Once spring arrives, the wasp pupates and emerges as the impressive adult pictured above in summer (Holm 2021).

Tiger Bee-Fly (Xenox tigrinus), Backyard, July 2024:

Despite its large and striking appearance, this formidable fly does not bite or sting people and should only be feared by its prey: Carpenter Bees (Xylocopa spp.). The Tiger Bee-Fly lays its eggs near Carpenter Bee nests, and the larvae make their way inside to consume the bee larvae.

Belted Kingfisher (Megaceryle alcyon), Grant Anderson Park, September 2024:

I have tried in vain to take a good, clear, photo of a kingfisher for many years now. These distinctive, charismatic birds are always on the move, and very aware of me whenever I approach with camera in hand. They need their good senses to spy fish underwater which they dive and catch. This past September, I finally managed to get a nice photo of this bird in the local park in Simcoe.

Cross Orbweaver (Araneus diadematus), Backyard, September 2024:

This large spider feasting on its dipteran prey had constructed a web on the edge of my back porch. Cross Orbweavers are introduced spiders here, native to Europe.

Mythimna Moth, Backyard, September 2024:

I believe this moth is of the genus Mythimna, but I’m not quite sure as it’s a fairly nondescript moth. The moths in this genus feed on grasses when larvae which would also line up with its discovery within my lawn (Beadle and Leckie 2012).

Sharptail Bee (Coelioxys), Backyard, September 2024:

Although the proportions of the pictured individual lead the head to be much larger than the thinning abdomen, the common name “Sharptail Bee” refers more to the females of these bees (the bee in the photo is a male) who have very pointed abdomens used to puncture the nest cells of Megachilid bees (Wilson and Carril 2016). Coelioxys eggs laid inside their hosts’ nests hatch and the emerging larva “uses tweezer-sharp mandibles to snip the egg or young larva of the host bee in half” (Wilson and Carril 2016). The larva then proceeds to consume the pollen that was stored away for the host bee’s young.

Apple Leaf Skeletonizer Moth (Choreutis pariana), Backyard, September 2024:

These are day-active moths, with larvae that feed on crab apple leaves. They were introduced to North America sometime around 1917 (Beadle and Leckie 2012).

References:

Beadle, David and Leckie, Seabrooke 2012. Peterson Field Guide to Moths of Northeastern North America. Houghton Mifflin Harcourt.

Beletsky, Les. The Red-Winged Blackbird: The Biology of a Strongly Polygynous Songbird. 1996. Academic Press.

Costa, James T. 2006. The Other Insect Societies. Harvard University Press.

Holm, Heather 2021. Wasps: Their Biology, Diversity, and Role as Beneficial Insects and Pollinators of Native Plants. Pollination Press.

Lisak, Sarah C., Hailey N. Shanovich, Amelia R.I. Lindsey, and Brian H. Aukema. “The Polydrusus Weevils (Coleoptera: Curculionidae) of the United States of America and Canada: Identification and Insights into the Ecology of Two Nonnative Species in Hazel (Corylus Spp.).” The Canadian Entomologist 156 (2024): e10. https://doi.org/10.4039/tce.2024.7.

Marshall, Stephen. 2018. Beetles: Their Natural History and Diversity. Firefly Books.

Marshall, Stephen. 2023. Hymenoptera: The Natural History and Diversity of Wasps, Bees, and Ants. Firefly Books.

O’Neill, Kevin M. 2001. Solitary Wasps: Behavior and Natural History. Cornell University Press.

Stokes, Donald and Stokes, Lillian. 1983. A Guide to Bird Behavior Volume 2. Little, Brown and Company.

Wilson, Joseph S. and Carril, Olivia M. 2016. The Bees in Your Backyard. Princeton University Press.

For previous Photo recap posts, see:

–Norfolk Naturalist Year in Photos, (Dec 2022-Nov 2023)

–Norfolk Naturalist Year in Photos (Dec 2021-Nov 2022)

Categories
Algonquin August 2023

Peck Lake Trail (Algonquin Observations August 2023, Part 4)

One of my favourite trails within Algonquin Provincial Park is the Peck Lake trail, because it circles a lake, offering a variety of habitats with their various inhabitants. Edge habitat (habitat that is at the edge of habitat types, such as coastlines or riversides) is often more diverse than core habitat (the center of a habitat range, eg. The middle of a forest), for obvious reasons: the edges of a habitat type contain representatives from the habitats surrounding it and species that are unique to the edge itself. So there are ecological reasons that this sort of habitat would be especially diverse in species and I have certainly found a large complement of creatures along this trail on my visits through the years. 2023 was no exception.

Bordering the lake were several patches of flowers, which were visited by many wasps, bees and flies (many of which resembled wasps or bees themselves). Bumblebees were abundant, and there were a few wasp-mimicking flies among them. Both pictured below are members of the Flower Fly family (Syrphidae).

White-spotted Pond Fly (Sericomyia lata).
Bald-faced Hornet Fly (Spilomyia fusca)

Of course, not all flower visitors were wasp mimics, many were the real thing. A crabronid of the genus Ectemnius was seen visiting a flower and another crabronid was seen emerging from its burrow at a different part of the trail. When I was first reviewing my photos I assumed that both members of the family Crabronidae that I observed dug into the ground for their nest burrows. Crabronidae is associated in my mind with “burrowing solitary wasps”. But Ectemnius wasps actually often nest in dead wood or plant stems (Holm 2021).

Ectemnius, a Crabronid wasp visiting a flower.
Crabronid wasp emerging from its burrow.

Another flower-visiting wasp was the intriguingly named “Parasitic Aerial Yellowjacket” (Dolichovespula arctica). As you might have guessed, this species is parasitic… and if you know how social parasitism works, then you could have guessed its host: another member of the Dolichovespula genus (Bald-faced hornets, D. arenaria or D. alpicola) (Holm 2021). After a non-parasitic wasp nest is beginning in Spring, a queen of this species will join and start laying her own eggs. She doesn’t produce workers like her hosts, but instead produces female and male reproductives only and through social aggression she forces the host’s workers to rear her young (Holm 2021). After some of her young are reared, she will kill the host queen and the nest will start to collapse (as yellowjacket/hornet nests do every year in the fall), workers will lay their own eggs which will hatch into reproductive male wasps (Holm 2021). After mating, the D. arctica queens will find hibernation sites in order to wait out the winter and start the cycle of revolution all over again next spring.

Parasitic Aerial Yellowjacket (Dolichovespula arctica).

One other wasp was observed not on a flower, but on the branch of a tree, its bold coloration catching my eye. The Spotted Cuckoo Spider Wasp (Ceropales maculata) is another wasp which doesn’t create its own nest. Like the Parasitic Aerial Yellowjacket described above, this wasp usurps the nest of another related wasp, this time a non-parasitic Spider Wasp (Pompilidae). C. maculata lays an egg in the host’s captured prey (a spider) before the host buries her prey along with her own egg. Within the host’s burrow, the Cuckoo Spider wasp egg hatches and the hungry larva consumes the host’s egg and the captured spider (Holm 2021).

Spotted Cuckoo Spider Wasp (Ceropales maculata).

The Hymenopteran and Dipteran flower visitors were likely foraging in the flowers themselves for nectar and/or pollen, whereas other larger flower perchers were merely looking for a place to alight. Large and beautiful Dragonflies spread their wings in the morning sunlight while resting on lakeside flowers. The powdery blue bodies of the Slaty Skimmers (Libellula incesta) were particularly common and striking. These dragonflies were most obliging for my photographs, often allowing me to get quite close to their resting forms.

The sharp red of Meadowhawks (Sympetrum sp.) were also common along the lakeshore foliage.

Rounding out the insect observations was a Scorpionfly (Panorpa sp.) which I spotted among the leaf litter.

Within the lake itself, I spotted many frogs, and one was quite interesting in being at the penultimate stage of its ‘tadpole’ life, neither tadpole nor fully frog, this was a transitory creature.

The ‘transitory’ frog, no longer a tadpole, but not quite an adult frog.

Among the branches above, I encountered two more wood-warbler species, not seen at the warbler river in Pog Lake (See Warbler River (Algonquin Observations August 2023, Part 3)). The Common Yellowthroat (Geothlypis trichas) is a bird that I associate with the wetlands of Long Point, not the woodlands of Algonquin, but Ron Tozer in Birds of Algonquin Park (2012), states “Probably the most widespread warbler, it is common in wet brushy habitats, weedy fields, and marshes through most of North America.”

Common Yellowthroat female, lacking entirely the black mask of the males.

Another new Warbler for the trip was the Black-throated Green Warbler (Setophaga virens) darting among the conifer branches.

Black-throated Green Warbler (Setophaga virens).

Perhaps surprising, given my usual focus on insects and birds, my most striking observation on this trail walk was a plant.

One of the habitats merging with the edge of the lake was a small marshy area* which contained the dragonflies and frogs you might expect. But there was also a bog plant that I have never observed in the wild before and that struck me as particularly exciting: Round-leaved Sundew (Drosera rotundifolia).

*I will not get into the sinkhole that is wetland characterization… bog/marsh/swamp and other names in this vein are technically different things but ecologists often disagree what the parameters are for each or how to really define them. Although non-scientists might find it amusing, the controversy/discussion arises out of the importance in science of imposing definitions on the world in order to be able to dissect and discuss discrete entities and the real world often defies such limitations because it is just too complex of a system.

Round-leaved Sundews have highly modified leaves which sprout droplets which glisten in the sun. These droplets are sticky and insects which land on them are slowly entrapped by the folding leaves. Once an insect is trapped, the sundew secretes enzymes to digest its prey. The consumption of insect prey takes about a week or more (Eastman 1995). I was overjoyed to spot this amazing carnivorous plant, flourishing in its habitat within Algonquin Park.

References:

Eastman, John. 1995. The Book of Swamp and Bog. Stackpole Books.

Holm, Heather. 2021. Wasps. Pollination Press.

Tozer, Ron. 2012. Birds of Algonquin Park. The Friends of Algonquin Park.

For Previous Algonquin Observation posts, see:

–Warbler River (Algonquin Observations August 2023, Part 3)

–Lakeside Lives (Algonquin Observations August 2023, Part 2)

–Campsite Companions (Algonquin Observations August 2023, Part 1)

–Robber Fly Hunting Queen Ant

–Algonquin in August

–Canada Jay (Perisoreus canadensis)

–Moose (Alces alces) Family

–Algonquin Observations, Part 5 – Spruce Bog: The Reckoning

–Algonquin Observations, Part 4 – Spruce Bog Speedrun and the Logging Museum Trail

–Algonquin Observations, Part 3 – Peck Lake Trail

–Algonquin Observations, Part 2 – Opeongo Road

–Algonquin Observations, Part 1 – Pog Lake Campground

Categories
Algonquin August 2023

Campsite Companions (Algonquin Observations August 2023, Part 1)

In August of 2023, I returned to one of my favourite places: Algonquin Provincial Park. While there, I photographed and encountered varied organisms and I’d like to take the opportunity to explore and describe these nature observations in a series of blogposts, as I often do.

When first arriving at our campsite, I observed not a living thing itself, but rather the mark of a living thing on its environment: I found a bird nest. According to iNaturalist it is likely the creation of a Vireo (genus Vireo, who said Scientific names were hard to remember?). The most common Vireo in Southern Ontario is the Red-eyed Vireo (Vireo olivaceus), so this was likely constructed by a member of this species. A description of their nest construction is appropriate here: “The female spends 4 to 5 days constructing a nest of bark strips, grasses, pine needles, wasp-nest paper, twigs, and plant fibers that hangs below the branch. She glues the materials (some of which are provided by the male) together and to the branch fork with spider-web adhesive, occasionally supplemented with spider egg cases and sticky plant fibers.” (Cornell Lab of Ornithology 2019). I love thinking of the time and effort that went into this small nest. Just think of the spiders’ webs and egg cases that went into this architecture.

Small eye-level nest of a songbird, likely a Vireo of some sort.

While exploring our campsite, a very different organism was in the process of creating a nest, a crabronid wasp female. This tiny black-and-yellow wasp was investigating the ground of our campsite for a location to create a  burrow. The wasp landed several times and dug a little bit into the sandy soil then hovered for a while, circling the area before dropping to the ground once more. At one point, it entered the firepit and dug rapidly into the ashes within, crafting itself a very easily constructed but frightfully unwise burrow. It put me in mind of the parable of the man building a house on sand, perhaps there is a Hymenopteran equivalent about “digging one’s burrow in ashes”. In any case, I don’t think the wasp was settled on the firepit as its burrow location because after forming these temporary exploratory burrows, she flew off and wasn’t seen the rest of the day.

“Do not dig your burrow in ash” – ancient Hymenopteran proverb.

A few days later, I spotted her hovering form once more, this time accompanied by a prey item. Dragging below her was a corpse larger than herself, that of a Horse Fly (Tabanidae). I never witnessed the end of her journey, I’m not sure if she found a good spot to bury her large prey to feed her young. But I hope that she did.

Crabronid wasp dragging her larger horse fly prey below herself.

Another Hymenopteran was looking to provision for its young, although its prey was far larger than a horsefly. The creature was a Black-and-red Horntail (Urocerus cressoni) and its prey was a tree. Horntails (Suborder Symphyta) lay their eggs inside the trunks of trees and the larvae feed within. Urocerus cressoni larvae feed inside of Pine trees and their relatives (Marshall 2023).

Black-and-Red Horntail (Urocerus cressoni) resting on the trunk of a tree, likely searching for a place to lay her eggs.

Many other insects were observed on the trees, plants and litter of our campsite and the surrounding areas of the Pog Lake Campground. Some True Flies (Order Diptera) caught my attention. A bright and shiny Dolichopus skittered about in the leaf litter, and an elongate Robber Fly (Genus Machimus) was spotted on fallen pine needles.

Dolichopus Fly.
Robber fly of the genus Machimus.

Some of the most beautiful insects found in the Pog Lake campground were the Dragonflies (Order Odonata). A strikingly large Dragonfly of the genus Aeshna was basking in the sun on the trunks of trees and (when I was able to take its photo) on our dining tent entrance.

A much more easily missed odonate was the Variable Darner (Argis fumipennis), a smoky grey presence among the pine needles and fallen bark.

Resting along a branch was a beautiful Autumn Meadowhawk (Sympetrum vicinum), in a colour phase that I hadn’t observed before. Males of this species are a bright red with a rusty-red thorax, but females (like the one I encountered) are yellowish. I was able to get very close to this dragonfly and was rewarded with some beautiful photographs.

We didn’t just hang out by our campsite in Pog Lake, but we spent quite a bit of time at the campground beach and that will be the focus of my next blogpost.

References:

Cornell Lab of Ornithology. 2019. All About Birds. Cornell Lab of Ornithology, Ithaca, New York. https://www.allaboutbirds.org/guide/Red-eyed_Vireo/lifehistory#nesting Accessed on [1/24/24].

Marshall, Stephen A. 2023. Hymenoptera

For Previous Algonquin Observation blogposts, see:

–Robber Fly Hunting Queen Ant

–Algonquin in August

–Canada Jay (Perisoreus canadensis)

–Moose (Alces alces) Family

–Algonquin Observations, Part 5 – Spruce Bog: The Reckoning

–Algonquin Observations, Part 4 – Spruce Bog Speedrun and the Logging Museum Trail

–Algonquin Observations, Part 3 – Peck Lake Trail

–Algonquin Observations, Part 2 – Opeongo Road

–Algonquin Observations, Part 1 – Pog Lake Campground

Categories
Uncategorized

Norfolk Naturalist Year in Photos, (Dec 2022-Nov 2023)

Siederia walshella, on the Lynn Valley Trail, April 2023:

On a walk on the trail by my house, I spotted this tiny creature (about a cm long) climbing up the trunk of a tree. I’m not positive on the identification, but it’s based on iNaturalist’s auto-ID for my photo and seems to match from what I can tell. If the ID is correct, this tiny caterpillar was likely searching for lichen to eat.

Eastern Spotted Newt (Notophthalmus viridescens), in my Parents’ pond, April 2023:

For the past few years, my parents’ garden pond has been host to these amazing creatures. All amphibians impress with their transformation from aquatic to terrestrial life but the Eastern Spotted Newt outdoes this life cycle with some incredible twists and turns. Larval newts transform into terrestrial juveniles (known as “efts”) and leave the water behind, living in the leaf litter. While on land, the efts have a rough reddish brown skin which keeps moisture in. After two to seven years, the efts undergo another transformation, darkening in colour and gaining a raised tail fin which aids them as they return to the water as aquatic adults. The newt pictured above is in this final stage of life: an aquatic adult. This isn’t necessarily the end of the newt’s transformations however, since some newt adults leave the water and regain some of their terrestrial attributes (rougher dry skin, loss of tail fin) for hibernation on dry land (Harding and Mifsud 2017).

Greater Bee Fly (Bombylius sp.), Lynn Valley Trail, April 2023:

This fuzzy fly has special adaptations to gather sand in its abdomen which it coats its eggs with before launching the eggs into solitary wasp nests (dug in sand presumably) (Marshall 2012). The larvae hatch from the eggs and enter the nest chambers of their host before feeding on a single host larva each (making the Bee Flies parasitoids, consumers of a single prey item).

Canada Goose (Branta canadensis) Parent and Gosling, Grant Andersen Park, May 2023:

Canada Geese are both common and abundant so they usually don’t catch my eye, but I really liked how the gosling was in the exact same pose as its nearby parent in this photo.

Spotted Sandpiper (Actitis macularius), Grant Andersen Park, May 2023:

The picture is blurry because the action was taking place across some water from my camera lens, but this fascinating courtship display was happening right in the middle of Simcoe in Grant Andersen Park. These shorebirds performed their display a few times and then mated and dispersed.

Sandhill Crane (Grus canadensis) family, Long Point, May 2023:

Sandhill Cranes have captures my heart with their wild resonant calls and their impressive size. It was a special treat to watch this family of two parents and two young foraging at the edges of a marsh in Long Point.

Canada Warbler (Cardellina canadensis), Long Point Old Cut Birding Station, May 2023:

Canada Warblers migrate into Ontario to breed during May/June, creating nests near the ground on stumps or small mounds (Bezener 2016). Then in late summer/early Fall they set off again to leave the Canadian winter behind them. Like other Wood-Warblers (the Family Parulidae) they consume insects and spiders, taken from plants or the ground.

White-Tailed Deer (Odocoileus virginianus), Lynn Valley Trail, June 2023:

This deer was incredibly close to the trail, so I was able to capture its gaze among the purple wildflowers.

Velvet Ant (Timulla vagans), Backyard, July 2023:

Velvet Ants are not members of the ant superfamily (Formicoidea) but are instead solitary wasps (members of the family Mutillidae). Their larvae develop as parasitoids on the larvae of other wasps (in the case of Timulla vagans, their hosts are Crabronids and Eumenine wasps (Marshall 2023)). The males of Timulla vagans are winged unlike the ant-like females and will carry the wingless females in their mandibles during their mating flight (Waldren et al 2020).

Physocephala marginata, Backyard, July 2023:

Although this insect drinking nectar appears to be a wasp, it is actually a fly of the Family Conopidae. Female Physocephala marginata seek out their lookalikes (wasps and bees) at flowers. After apprehending a host wasp or bee, P. marginata uses its abdomen to insert an egg inside the host’s abdomen (Marshall 2012). The egg hatches inside and the larval Conopid consumes the host from the inside.

Tachinid Fly (Exorista sp.), Backyard, August 2023:

Tachinid Flies are yet another group of parasitoid insects. Stephen Marshall, in his giant book on flies had this to say about this huge family of flies: “The Tachinidae is in many ways the ultimate fly family. With almost 10,000 named species and thousands more awaiting description… exhibits an unparalleled variety of sizes, shapes and colors. The range of life history strategies is equally amazing, at least within the constraint that every know species in the group is a parasitoid that develops inside another insect… or related arthropod” (Marshall 2012, p 386). Hosts of this genus are caterpillars or sawfly larvae.

Brown Marmorated Stink Bug (Halyomorpha halys), Backyard, August 2023:

This species of Stink Bug is native to East Asia but was introduced to North America accidentally in the 1990s. As with many successful and widespread introduced species, the Brown Marmorated Stink Bug can feed on a wide diversity of plants and can be a serious pest of agriculture and gardens. The pictured insect is a nymph, not quite an adult because it is missing fully developed wings across its back.

Green Heron (Butorides virescens), Waterford Ponds, August 2023:

The above photo was actually taken by my wife on an outing to Waterford Ponds. She was quicker on the draw to find and focus on this beautiful bird amidst the morning mist and tangled reeds of its marshy habitat. I’ve written an article about these amazing birds because of a different close encounter I had, go here to learn more!

Common Whitetail Dragonfly (Plathemis lydia), Front of House, September 2023:

As I was entering my house, I was stopped by the sight of this wondrous insect framed perfectly on my siding beside my door. I carefully entered the house to retrieve my camera in order to get this picture. One of the first Dragonflies photographed at my house since I don’t have a backyard pond… yet. The Common Whitetail pictured is a male, distinguishable because it has the chalky white abdomen which it uses as a signal to chase other males off of its territory. Females of this species have multiple bands on their wings and a dark abdomen.

Double-crested Cormorant (Nannopterum auritum), Lynn River, September 2023:

When swimming in the water, a cormorant reminds me of a hook-billed loon or a merganser, but their especially long neck gives them away. Like loons and mergansers, cormorants are underwater divers, pursuing fish prey amid lakes and rivers. This one was foraging in the Lynn River right in the middle of Simcoe, and I was very excited to get a close look at its sleek profile as it dried off on the bank. You can’t see them in the photo, but it was amidst a crowd of Canada Geese.

Great Spangled Fritillary (Argynnis cybele), Backyard, September 2023:

I at first thought this large butterfly was a Monarch (Danaus plexippus) as it was nectaring among our milkweed patch, but I quickly realized it was a different species. After patrolling our garden, this fluttering visitor rested and spread its wings on our orange plastic picnic table where I snapped this picture. The caterpillars of this species make it through our winter, after hatching just before the cold arrives (Hall et al 2014).

Black Swallowtail Caterpillar (Papilio polyxenes), Backyard, September 2023:

These colourful caterpillars feed on plants in the Carrot family (Apiaceae), and there were several munching away on our garden carrots this year. My 3-year old son helped me demonstrate one of their defensive strategies for this photo. If provoked these conspicuous caterpillars unfold the orange organ featured here, named an osmeterium, which has a foul odor (I would describe it as old rotten cheese, it was surprisingly powerful for such a small creature) (Marshall 2006). If I were a caterpillar-foraging bird or mammal, I would avoid such smelly prey.

Virginia Giant Hover Fly (Milesia virginiensis), Backus Woods, September 2023:

As the name implies, this fly was large and conspicuous in a sunny clearing. The larvae of these large flower flies (Syrphidae) develop inside rotting trees, sometimes inside tree holes (Skevington and Locke 2019).

Shadow Darner (Aeshna umbrosa), Backus Woods, September 2023:

Darners are huge dragonflies (over 7 cm long), instantly noticeable when in flight but this one cooperated in staying still while I took its picture. The Shadow Darner is named after its habit of flying late in the day (even at dusk) and staying mostly in shade (Marshall 2006). This one was photographed in the afternoon.

Chinese Mantis (Tenodera sinensis), Backyard, September 2023:

There are no Mantids native to Ontario, both of our common species: the European Mantis (Mantis religiosa) and the Chinese Mantis pictured here, were introduced to North America over a hundred years ago (Marshall 2006). This very large and impressive insect was clambering through my garden and nicely posed for a few pictures but this was my favourite photo I took, showcasing its powerful grasping forelegs and its triangular head.

References:

Bezener, Andy. 2016. Birds of Ontario. Partners and Lone Pine Publishing.

Hall, Peter, Jones, Colin, Guidotti, Antonia, and Hubley, Brad. 2014. The ROM Field Guide to Butterflies of Ontario. Royal Ontario Museum.

Harding, James H. and Mifsud, David A. 2017. Amphibians and Reptiles of the Great Lakes Region. University of Michigan Press.

Marshall, Stephen. 2006. Insects: Their Natural History and Diversity. Firefly Books.

Marshall, Stephen. 2012. Flies: Their Natural History and Diversity. Firefly Books.

Marshall, Stephen. 2023. Hymenoptera: The Natural History and Diversity of Wasps, Bees, and Ants. Firefly Books.

Skevington, Jeffrey H. and Locke, Michelle M. 2019. Field Guide to the Flower Flies of Northeastern North America. Princeton University Press.

Waldren GC, Roberts JD, Pitts JP (2020) Phoretic copulation in the velvet ant Sphaeropthalma pensylvanica (Lepeletier) (Hymenoptera, Mutillidae): A novel behavior for Sphaeropthalminae with a synthesis of mating strategies in Mutillidae. Journal of Hymenoptera Research 78: 69-89. https://doi.org/10.3897/jhr.78.55762

For last year’s photo recap, see: Norfolk Naturalist Year in Photos (Dec 2021-Nov 2022)

Categories
Blogversary

Happy 4th Birthday, Norfolk Naturalist!

Dance Fly of the genus Dolichopus in my backyard.

It’s that time of year again, when I review the past year of blogging and reading, as well as the last year of photos. The photos will be showcased in the next blog post, sometime in December. This post will be all about my past blogging year (Dec 2022-Nov 2023) since this is the anniversary of my first blogpost on this site. Here we go!

Garter Snake on the Lynn Valley Trail.

The first article after last years blogversary article was the start of a new tradition, my blogging year top photos! (Norfolk Naturalist Year in Photos (Dec 2021-Nov 2022)) I plan to do the same thing this year, so keep an eye out for my next photo roundup post sometime in December.

Striped Skunk in my backyard, affectionately named by my son, “Jam”.

In August 2022, I went on a night hike to listen to bats and it was an incredible experience. So incredible that I wrote a post about it: Flying Creatures of the Night. Then I wrote a post about one of the two bat species we observed on that night hike, Big Brown Bat.

Slug on the Lynn Valley Trail, affectionately named by my son, “Trail”.

In March, I finally completed a book review I’ve been working on for a while for Terns, by David Cabot and Ian Nisbet. Then in April, another Norfolk Field Naturalist outing inspired me to write an article, this time about the American Woodcock: The American Woodcock in Literature and in Life.

Great Golden Digger Wasp (one of my new favourites) in my backyard.

Over the rest of the year, I completed some more of My Top 20 Nature Photos of 2013-2020… of which there are still over half to come… But anyway, I wrote about a Spring Peeper, a Leafhopper, a Maple Looper Moth, and a Common Compost Fly.

Goldfinch at the Royal Botanical Garden trails in Hamilton.

Between these, I published an article about my observations on one of my camping trips this past summer, to Port Burwell. I went on 2 other significant camping trips, one to Algonquin and another to Pinery Provincial Park. I’d like to write up my observations on both of those trips as well (I saw lots of neat creatures as always), but haven’t finished writing about them yet.

American Toad, in the RBG trails.

In September, I finished a post that I have been working on in the background for a long time, about the beautiful fly genus: Callopistromyia, the Peacock Flies. And in October, I reposted one of my tumblr blog posts: Hidden Worlds, a post about some of my early explorations with my macro lens and the world of springtails.

Caspian Tern, at Waterford Ponds.

And as usual, here is a list of the nature-related books that I read during the past blogging year, with short reviews/thoughts:

A Small Porch, by Wendell Berry:

In this collection of poetry, some were quite beautiful, the ones which invoked a sense of being outside in nature experiencing the curiosity and wonder of trees and birds and flowers, and the turning of seasons. The Essay which makes up a third of this collection was quite fascinating with lots to think about and much to challenge the way we think about land use. Powerful stuff that I will certainly be thinking about into the future.

Great Lakes Nature: An Outdoor Year, Revised and in Color, by Mary Blocksma:

Very nice short articles about different nature observations throughout the year, with nice small illustrations and with a focus on identification. No scientific names, which was a negative for me (because I like scientific names). For someone just getting into an awareness of the natural world around them I would say this book is an excellent way to make nature observation and identification a habit. For myself, already having established nature observation as a habit I didn’t find it as interesting or useful.

The Guests of Ants: How Myrmecophiles Interact with Their Hosts, by Bert Holldobler and Christina L. Kapwich:

Wonderful exploration of the fascinating world of Ant Guests, those organisms that have made their way into ant colonies (or in/on the ants themselves). There are detailed case studies, tantalizing avenues for further study, and marvels on every page. The images are incredible and the stories of the myrmecophiles are often jaw-dropping. More of a sequel to “The Superorganism” in style and coverage than “The Ants”. 

The Handbook of Bird Families, by Jonathan Elphick:

Excellent at conveying the global diversity of birds (there are almost 11 000 species named and I found myself encountering genera and families that I had never heard of before on a regular basis within). The photographs are excellent, though often small. The text is also very small print, which could be a challenge to some readers.

Each family of birds receives at least 1 or two paragraphs of broad overview as well as a fact-box with quick stats, some families which are hyper-diverse being allotted 3-5 pages of text. The text mainly catalogues diversity, by describing which subfamilies the family is divided into, how many and which genera are in what parts of the world and brief snippets of natural history and behaviour throughout.

There were editorial errors on a regular basis unfortunately… it felt like paragraphs had been reassigned to different Bird Families after being written because of taxonomic changes or as though they were pieces of a previous book, shifted into a new context without being thoroughly proofread. This caused some confusion, but not too much, and overall the amount of information within about bird diversity was absolutely worth the occasional re-read of a confusing paragraph. I think it could have used a more thorough editor but overall a very good book cataloguing the world’s avi-fauna.

Frogs and Toads of the World (2011), by Chris Mattison:

Amazing tour through the diversity of Frogs and Toads throughout the globe. With a species count of 5000+ this 200 page book can only serve as an introduction to the true diversity of the group, but as such an introduction it works well, full of excellent photos and informative text.

Cranes of the World, by Paul Johnsgard:

While dated, this book provided an excellent summary of what was known about Cranes (fascinating birds of the Family Gruidae) throughout the world in the 1980s. I uncovered many interesting facts about these beautiful birds within. I found the species accounts (which make up the majority of the book) to be somewhat dry but the book is designed to be a reference work, so I can’t blame it for laying out the facts systematically. It remains the only book of its kind as far as I can tell and it’s freely available online: https://digitalcommons.unl.edu/cgi/vi…
So if you’re interested in Cranes, check it out!

The Best Of The Raven: 150 Essays From Algonquin Park’s Popular Newsletter, by Dan Strickland and Russ Rutter:

I read these natural history essays while camping at Algonquin Park (2 trips), and thoroughly enjoyed them. Full of information that brings you deeper into the fascinating natural world surrounding you in Algonquin Park, amazing.

Consider Her Ways, by Frederick Philip Grove:

This book was so much fun. An expedition of leafcutter ants goes forth into the unknown continent of what we call North America. Along the way they encounter new species of ants with new ways of living and document their astounding discoveries into the world of humanity and ant-kind.

The journey is epic, the philosophies discussed by the ants are fascinating and relevant, and there is even an amazing ‘cameo’ by a famous myrmecologist. The format of the book is so much fun, with footnotes lending the document a verisimilitude that I loved (for example the human discoverer of the document mentions his confusion at certain phrases but opted to leave them in for completeness). The ending was rather abrupt and I was a little disappointed that the main encounters and discoveries discussed were limited to ants and humans rather than any other species that the ants would have encountered.

Overall, a very fun read, a tour through the world of ant diversity told from the perspective of some ants themselves. Amazing.

The Nature of Oaks: The Rich Ecology of Our Most Essential Native Trees, by Douglas W. Tallamy:

The book moves through the year month by month describing the various ecological happenings on oak trees during those months. So I read through the book in that way, reading each month as it was happening around me. Interesting, learned lots, and I now pay more attention to Oak trees when I find them.

That wraps up my blogversary article for this year! Hope you enjoyed the brief tour of my nature writing/reading year. Next up will be my roundup of top nature photos from this past year, stay tuned!

For previous blogversary articles, see below:

–Happy Birthday, Norfolk Naturalist!

–Happy 2nd Birthday, Norfolk Naturalist!

–Happy 3rd Birthday, Norfolk Naturalist!

Categories
diptera Species Profile

Callopistromyia, the Peacock Flies

For this article I’d like to consider one of the most beautiful insects I’ve ever had the pleasure of observing: the Peacock Fly (Callopistromyia annulipes) and its relative, the only other member of its genus the Peahen Fly (Callopistromyia strigula)*. The main difference in appearance between these two species is in their wings: C. strigula contains much narrower wings than C. annulipes (Kameneva and Korneyev 2006).

*There is no common name for C. strigula, so I made one up. You might be surprised that there isn’t a common name, but consider that there are hundreds of thousands of species of Flies, and many of these are only known within specialist groups that study the differences between them. This is also the reason that there isn’t much information available for these Flies despite their beauty and conspicuousness.

Callopistromyia annulipes, the Peacock Fly. Note the wide wings and the position they are held in above the body.
Callopistromyia strigula, the Peahen Fly. Note the relatively narrow wings, and their position held out to the sides of the body.

C. annulipes is distributed across the United States and occurs in three provinces of Canada: British Columbia, Alberta, and Ontario, while C. strigula is found in Manitoba, Ontario and Saskatchewan as well as several States. Over the past several years, this species has spread into Europe as well, no doubt via human means (Pintilioaie and Manci 2020). 

In both species males and females display, contrasting with many fly species in which only the males display for the females to choose from among them. I don’t want to discuss sexual selection and mate choice here in any depth. Suffice to say that because both males and females perform displays there is likely mutual sexual selection going on in these species, meaning that traits are preferred and chosen by both sexes in this species, rather than a female-choice bias or male-choice bias.*

*of course, this only applies if the displays and accompanying appearances are sexually selected for, but there are other ideas for what forces are selecting these displays (see further below).

Video of Peacock Fly (Callopistromyia annulipes) displaying on a bridge railing on the Lynn Valley trail in Simcoe.

Little is known of these species’ biology other than that they display on conspicuous surfaces (more on this below), and there are records of the adults of C. annulipes feeding on the frass from wood-feeding beetle tunnels* (Steyskal 1979). Their puparia** have been found beneath the bark of various deciduous trees, so it’s presumed that their larvae feed on dead wood, or fungi within dead wood or something associated with dead wood. 

*Frass is a fancy way of saying “insect excrement and related material” usually used in connection with wood-boring insects… that ‘related material’ bit is key here since although a lot of what we call frass passes through an insect’s digestive system it can also be broken up bits moved behind a wood-boring beetle, so less insect “poop” and more insect “debris”.

**puparia refers to the hardened larval skin that encloses the pupal stage of derived Diptera… which probably doesn’t explain very much unless you know what those other terms mean. Basically, instead of nothing surrounding the pupa (the transformative stage of insects, between larva and adult), a huge branch of the Fly Family Tree (the Cyclorrapha) hardens their final larval stage skin into a protective case, sort of the fly version of a chrysalis.

As with many Diptera, their larvae are mysterious. After much searching, I managed to find a few pictures of Callopistromyia larvae online. I was amazed and contacted the person who recorded these organisms to obtain permission to share the relevant information and images.

The pictures depict larval and pupal C. strigula which were found feeding on the inner bark of a boxelder tree (Acer negundo) (van der Linden 2018). I can’t find any pictures or information pertaining to C. annulipes larvae, but presumably they have the same or similar feeding habits. 

Finally, the most attractive thing about these species are their displays. The reason I’m writing about these flies is because I noticed them, and the reason I noticed them is because they strutted about on the railings of bridges on the Lynn Valley Trail. The Peacock Fly (Callopistromyia annulipes) in particular raises its large wings so that they meet above its back presenting a very noticeable display. By contrast, C. strigula adults display their wings in a more horizontal fashion. Presumably, these displays are about attracting mates and because the displays are performed by both sexes, they are about mutual mate choice. In other words, males are displaying to attract the attention of females and females are displaying to attract the attention of males. An intriguing possibility is that these wing displays are about more than finding a mate… they could also be an example of predator mimicry.

Can you see the face of a Jumping Spider in the Peacock fly’s wing-pattern?

A fascinating paper with an excellent title* describes how other species of Ulidiidae (the family of Flies that includes Callopistromyia) have wing patterns and displays that mimic the appearance of Jumping Spiders (Salticidae) (Hill et. al. 2019). The reason? Jumping Spiders are visually hunting predators of basically any insect they can catch. The wing patterns are possibly exploiting the visual system of Jumping Spiders by causing the spiders to believe they are staring down another Jumping Spider and so to be cautious. I can’t help but be intrigued by this idea, and somewhat skeptical. Despite its appeal, there are some problems with the hypothesis. One problem that came to my mind is that Jumping Spiders will hunt other Jumping Spiders. So if the pattern is supposed to resemble a Jumping Spider and deter them from predating the fly, why would it? The paper acknowledges that there are still many unknowns, but the authors make a good case that at least some insects are manipulating salticid responses to prey with visually deterrent patterns. And they also note: “In a natural setting even a brief delay in the attack of a salticid could allow these flies to escape” (Hill et. al. 2019). As always in science, more studies are needed…

*The title, for those of you who don’t read through the References section, is “Do jumping spiders (Araneae: Salticidae) draw their own portraits?” The idea is that in avoiding hunting insects that resemble themselves, jumping spiders leave those ones alive to reproduce in like kind and so jumping spider resemblances are crafted by the natural selection of the jumping spiders themselves.

There is always more to learn, and always new organisms to explore in the world. I hope you enjoyed my dive into the beautiful flies of the genus Callopistromyia, the Peacock Flies. 

References:

Hill, David, A. P. C., Abhijith, and Burini, Joao. 2019. “Do jumping spiders (Araneae: Salticidae) draw their own portraits?” Peckhamia 179.1: 1-14. (full pdf available here: https://peckhamia.com/peckhamia/PECKHAMIA_179.1.pdf)

Kameneva, Elena and Korneyev, Valery. 2006. “Myennidini, a New Tribe of the Subfamily Otitinae (Diptera: Ulidiidae), with Discussion of the Suprageneric Classification of the Family”. Israel Journal of Entomology. Vol. 35-36, 2005/6: 497-586.

Pintilioaie A-M, Manci C-O (2020) First record of the peacock fly Callopistromyia annulipes (Diptera: Ulidiidae) in Romania. Travaux du Muséum National d’Histoire Naturelle “Grigore Antipa” 63(1): 87-91. https://doi.org/10.3897/travaux.63.e50920

Steyskal, George C. 1979. “Biological, Anatomical, and Distributional Notes on the Genus Callopistromyia Hendel (Diptera: Otitidae)”. Proceedings of the Entomological Society of Washington. 81(3): 450-455.

van der Linden, John. 2018. https://bugguide.net/node/view/1510354

For other blogposts focused on Flies (the vast insect Order Diptera), see:

–5. Robber Fly Hunting Queen Ant

–Flies: The Natural History and Diversity of Diptera, by Stephen A. Marshall

–Flies Falling to Fungi and Other Dipteran Observations

–Fuzzy Flies and Song Sparrows

–Eastern Band-winged Hover Fly

Categories
Hemiptera Top 20 Photos 2013-2020

7. Leafhopper (Errastunus ocellaris)

Subject: Leafhopper (Errastunus ocellaris)

Location: Backyard

Date: June 2018

The Story behind the Shot: This beautiful leafhopper was found on the edge of the raised garden bed in my backyard.

The Story behind the Species:

I can find very little information about Errastunus leafhoppers, despite their beautiful and intricate patterns. They seem to be associated with grasslands, feeding on grasses with their piercing tube-like mouth. In North America (where they are introduced, the species was originally native to Europe), they are usually found in lawns and other disturbed grassy areas.

I shouldn’t be too surprised that leafhoppers (Family Cicadellidae) are understudied on the individual species level as there are approximately 22 000 species described (with an estimated 100 000 species total diversity) (source: bugguide.net). It’s these sorts of numbers that start to give you an idea of the diversity of insects, and why I find them so fascinating. You will never run out of insects to learn about, even if you run out of information about particular species!

For other blogposts in the series, see:

–My Top 20 Nature Photos of 2013-2020

–1. The Pale-Painted Sand Wasp (Bembix pallidipicta)

–2. Moose (Alces alces) Family

–3. Canada Jay (Perisoreus canadensis)

–4. Common Five-Lined Skink (Plestiodon fasciatus)

–5. Robber Fly Hunting Queen Ant

–6. Spring Peeper (Pseudacris crucifer)

And for another post with some focus on Leafhoppers, see:

–Leafhoppers, Lepidopterans and Longhorns

Categories
mammals Species Profile

Big Brown Bat

Big Brown Bat (Eptesicus fuscus). Photo by Sherri and Brock Fenton, used with permission.

Last year, I observed 2 bat species while on a night hike with the Norfolk Field Naturalists (for more about this hike, go here). The 2 bat species I observed were Eastern Red Bats and Big Brown Bats. I’d like to explore their biology and natural history, specifically within Ontario. This first post will be focused on the Big Brown Bat and another will focus on the Eastern Red Bat. I will be pulling most of my information from The Natural History of Canadian Mammals (2012), by Donna Naughton, unless otherwise indicated.

Big Brown Bats (Eptesicus fuscus):

Meaning Behind the Name: Eptesicus is from Greek which means “I fly” and “house” because Big Brown Bats like to roost in houses, and the species name fuscus is Latin for “dusk” (Etymologia 2005).

Biology and Natural History:

At 13 cm long and with a wingspan of up to 39 cm, this is Ontario’s second largest bat (the largest being the Hoary Bat (Lasiurus cinereus), and is fairly common in southern Ontario. Their global range extends all the way south to South America, and at the northern end there are scattered reports from Alaska. With such a wide range, there are differences in their habits across it. For example, Big Brown Bats in Ontario hibernate through the winter in “caves, mines, and deep rock crevices, as well as heated buildings” (Naughton 2012), but in more southern regions with plentiful insect food throughout the winter, they are active year-round. The list above of hibernation sites are specific permanent locations bats will find to spend the winter. During the day, however, Big Brown Bats will use a variety of roost locations, including tree hollows and beneath bark*.

*A curious note describes a surprising discovery of a male Big Brown Bat that had been roosting beneath loose bark in a Michigan wetland. While the author of the note was interacting with a data logger in the wetland, “a strip of bark about 1 m in length fell from one of the trees and crashed into the water about 3 m away from me. Mixed in with the bark fragments and covered with duckweed (Lemna sp.) was a half-submerged bat that I eventually identified as an adult male big brown bat.” (Kurta 1994). I was glad to read that the bat was “torpid but unharmed” and after warming up “the bat flew away” (Kurta 1994).

Big Brown Bats are generalist insectivores, consuming basically any insects they can catch. Their diet of hard-bodied insects wears down their large teeth but apparently worn teeth don’t affect their feeding habits. They feed at night, if conditions are favourable (such as not rainy, and sufficiently warm night temperatures). On cooler nights, some bats will undergo torpor (a sort of mini-hibernation state) to save energy and forgo foraging. When they are out hunting, Big Brown Bats use echolocation to find insect prey. Although we think of echolocation calls as strictly for feeding, they inevitably function as signals, sometimes unintentionally. It has been demonstrated that Big Brown Bats are attracted to the echolocation calls of another species of bat (the Little Brown Bat, Myotis lucifugus) and the other species is attracted to Big Brown Bat calls as well (Barclay 1982). This is likely because echolocating bats represent an area with foraging opportunities or food sources.

Big Brown Bat (Eptesicus fuscus). Photo by Sherri and Brock Fenton, used with permission.

Pups are born in June-July in Canada, and begin flying at 21 days or later. In Eastern North America, most Big Brown Bats give birth to twins, while single pups are most often born in Western regions. Although the pups’ wings are the same size as adults, their weight is much smaller, providing them with an advantage while learning to forage. After about a month, the young are able to hunt for themselves (ie. are no longer dependent on nursing from their mothers), but will stick with their mothers for their first few hunts. Some male Big Brown Bats have lived more than 20 years (the demand on females of pregnant foraging and nursing is high and reduces their maximum lifespan).

Big Brown Bats are fascinating, and I was happy to hear and observe them last year. Next up will be the Eastern Red Bat!

References:

Barclay, R. M. R. 1982. “Interindividual use of echolocation calls: eavesdropping by bats.” Behavioral Ecology and Sociobiology, 10: 271-275. cited in: Altringham, John and Fenton, M. Brock, 2003. “Sensory Ecology and Communication in the Chiroptera” in: Kunz, Thomas and Fenton, M. Brock (eds.). 2003. Bat Ecology. University of Chicago Press.

Etymologia: Eptesicus fuscus. Emerg Infect Dis [https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3367660/]. 2005, Dec [date cited: February 11, 2023]. http://dx.doi.org/10.3201/eid1112.ET1112

Kunz and Lumsden, 2003. “Ecology of Cavity and Foliage Roosting Bats” in: Kunz, Thomas and Fenton, M. Brock (eds.). 2003. Bat Ecology. University of Chicago Press.

Kurta, Allen. 1994. “Bark Roost of a Male Big Brown Bat Eptesicus fuscus.” Bat Research News. Volume 35: no. 2,3.

Naughton, Donna. 2012. The Natural History of Canadian Mammals. University of Toronto Press.

For other mammal-focused posts, see:

Flying Creatures of the Night

Moose (Alces alces) Family

Swimming Squirrels

Categories
mammal

Flying Creatures of the Night

Big Brown Bat (Eptesicus fuscus). Photo by Dan Riskin, used with permission.

Last year, in August, I had the privilege of going for my first ever night-time hike. The hike itself was extremely short and straightforward but the goal wasn’t distance or challenge. The goal was to see and hear some of the flying and screeching mammals that come out at night: Bats.

To see these creatures, you need to go out at twilight, which is what myself and members of the Norfolk Field Naturalists did in August 2022. The night sky was beautifully clear, and as stars began to appear so too did small flying creatures seeking insect prey with high-frequency calls. I think everyone knows that bats use echolocation to locate prey in the darkness, but something else everyone “knows” is that bats are blind… but this isn’t true at all. Bats can see about as well as we can, which is to say that they can’t see amazingly at night. To compensate for this, bats create extremely high-frequency calls that are beyond the range of human hearing, and interpret the reflections of these calls, discerning objects (ie. Flying insects) that break up the soundwaves they create before the soundwaves return to the bats’ extremely sensitive ears.

Despite what I said earlier about most of their echolocation calls being too high-frequency for human hearing, I was able to listen in on their hunting cries with the aid of technology, an amazing experience. I used a bat detector which works by bringing any frequency sound down 100 Hz so that high-frequency sounds are emitted within human hearing range. This meant a bit of fiddling with the dials to hit the right frequency that the bats were calling at. 

This is the Bat Detector that I borrowed and used for the evening to listen in on hunting bat calls.

Once I got the hang of it, I was able to listen in on bats hunting in the night. The input was directional, so I had to aim my detector at where I thought a bat was flying which became increasingly difficult as the sky darkened. This obscurity was rewarding when I would happen upon a bat that I could not see by just scanning the dark sky with the detector. There were a few side effects of detecting high-frequency sounds and transmitting them loudly to my headphones. One was that on a certain frequency I could hear very distinctly a loud jangling and clinking sound every time that a fellow Field Naturalist put their hand into their pocket and bumped their keys. Another was that if I tuned into another frequency, the already-audible calls of many katydids in the woods became deafeningly loud in my ears. Whenever I caught the bats’ channel of calling and honed in on a hunting bat, any drawbacks were instantly alleviated.

Which kinds of bats were we observing? According to the website batnames.org (an online taxonomic tool tracking bat diversity) there are 1456 bat species named worldwide (Simmons and Ciranello 2022). Within Mammals, the order Chiroptera is second only in species diversity to the incredibly diverse order Rodentia (with approximately 2635 named species (Mammal Diversity Database)). Within Canada, there are just 20 species of bats, all belonging to the Family Vespertillionidae (Naughton 2012). Within Ontario, there are only 8 species of bats*, so we really only have the tip of a very massive iceberg of bat diversity worldwide. Our hike was led by Liv Monck-Webb of Nature Conservancy Canada and she identified the bats we heard and saw as likely belonging to just 2 species: Big Brown Bats (Eptesicus fuscus) and Eastern Red Bats (Lasiurus borealis).

*Big Brown Bat (Eptesicus fuscus), Silver-haired Bat (Lasionycteris noctivagans), Eastern Red Bat (Lasiurus borealis), Hoary Bat (Lasiurus cinereus), Eastern Small-footed Myotis (Myotis leibii), Little Brown Myotis (Myotis lucifugus), Northern Myotis (Myotis septentrionalis), and Eastern Pipistrelle (Pipistrellus subflavus) are the regularly occurring 8 species of bats in Ontario. Apparently there has been a single specimen of the Evening Bat (Nycticeius humeralis) found in Ontario on Point Pelee in 1911 (Naughton 2012). Naughton (2012) goes on to say that this species could appear more frequently in Ontario in the future with warmer average temperatures.

I would like to talk about the two bat species we observed in more detail in future blogposts, so stay tuned for that!

Eastern Red Bat (Lasiurus borealis), photo by NACairns, used with permission.

Being able to listen in on bats hunting was an incredible experience, and unlocked one more piece of local ecology. If you have the opportunity to do the same, I would highly recommend it!

References:

Simmons, N.B. and A.L. Cirranello. 2022B. Bat Species of the World: A taxonomic and geographic database. Accessed on 12/29/2022.

Mammal Diversity Database. (2022). Mammal Diversity Database (Version 1.10) [Data set]. Zenodo. https://doi.org/10.5281/zenodo.7394529

Naughton, Donna. 2012. The Natural History of Canadian Mammals. University of Toronto Press.

Categories
Uncategorized

Norfolk Naturalist Year in Photos (Dec 2021-Nov 2022)

Last year, as part of the Norfolk Field Naturalists, I was able to present 20 of my photos and discuss them. That was what prompted my still-ongoing “Top 20 Nature photos 2013-2020” series (Links to Introduction, 1. The Pale-Painted Sand Wasp (Bembix pallidipicta, 2. Moose (Alces alces) Family , 3. Canada Jay (Perisoreus canadensis) , 4. Common Five-Lined Skink (Plestiodon fasciatus) , 5. Robber Fly Hunting Queen Ant ). This year, I am able to present another 20 photos. I’ve decided this time to keep the range of selection and the range of discussion much more condensed and to form it around my blogging year and my blog’s namesake locality: Norfolk County, Ontario. By keeping the time constrained to a single year, representing each month at least once and the location constrained to a single county in Southern Ontario, I think it can give a sense of the turning of the seasons, something I’ve always been fascinated by. One further restriction is I tried to avoid photos/organisms that have already featured on my blog this year. Introduction complete, here come the photos of my blogging year in review:

Sandhill Cranes (Antigone canadensis) in Port Rowan, December 2021:

These beautiful birds are a sight to see in the winter, snow falling around their dancing forms. Their resonant trumpeting calls, and their acrobatics in the white fields are breathtaking.

Hooded Merganser (Lophodytes cucullatus) in Simcoe, January 2022:

I’m always pleased to find a species near to home, which I associate with farther away. I first encountered Hooded Mergansers in Algonquin Provincial Park, so I think of them as something from the wild north rather than my own county, but this past January, I took some photos of a female swimming through a park in downtown Simcoe.

Pine Siskin (Spinus pinus) in my backyard, February 2022:

While reading through nature books and articles, I have read often of Pine Siskins moving through my area during the Winter in some years, and I had always hoped to see them. This year was the first time I saw them, and while my photographs are not very high quality (taken through my back windowpane), I was very excited to see and document this species at my backyard bird-feeder.

Virginia Opossum (Didelphis virginiana) in my backyard, March 2022:

Virginia Opossums are the only marsupials in Canada, part of a diverse group of mammals that are distinct from the placentals which make up the rest of the Canadian mammals. People often shorten the name to “possum” but this is technically incorrect for these animals. Pouched mammals in the New World (ie. North and South America) are known as ‘opossums’ while those in the Old World (Mostly Australasia for this group) are called ‘possums’.

American Winter Ant (Prenolepis imparis) in my backyard, March 2022:

These common ants are active early in the Spring and late in the Fall, which is how they acquired their association with Winter (Ellison et. al. 2012). Some workers of this species can store excess amounts of food in their abdomens and become living storage canisters, much like the more well-known honeypot ants (Myrmecocystus in North American deserts, or Camponotus inflatus and Melophorus bagoti in Australian deserts) (Ellison et. al, 2012).

Eastern Cottontail (Sylvilagus floridanus) on my Parents’ Farm, April 2022:

The first members of this species were seen in Ontario in the 1860s. Prior to European colonization and agriculture (which opened up preferred habitat for them) these adaptable mammals were located further south in the United States and Mexico (Naughton 2012).

Northern Flicker (Colaptes auratus) in my backyard, May 2022:

Similar to my Hooded Merganser observation above, my first encounter with these amazing ground-foraging woodpeckers has coloured my appreciation for them as unique and surprising. I first saw Northern Flickers when driving through MacGregor Provincial Park in the early morning. Their speckled pattern was striking but even more distinctive was the way they move, like woodpeckers hopping up a tree trunk but horizontally on the ground surface rather than clinging to bark. Seeing a Northern Flicker in my own backyard was an exciting experience (it’s happened a few years now) and adds to my appreciation of the diversity all around me.

European Woolcarder Bee (Anthidium maniculatum) in my backyard, June 2022:

These solitary bees scrape the hairs off of leaves to line their nests (usually in a preexisting cavity in wood or plant stems). As the common name indicates, this particular bee species is introduced from Europe, and is the species you are likely to see in mid-summer (the native Anthidium species are active earlier in Spring) (Wilson and Carril 2016).

Yellow Warbler (Setophaga petechia) in Long Point, June 2022:

Migratory Warblers are always a treat to see in the Spring and Summer, and this colourful bird singing its heart out is one of my favourites. This species is widespread across North America and northern South America. In the more southern regions of its range, it may breed in mangrove swamps, while in Canada it can be found breeding in windswept tundra.

Cuckoo Wasp (Chrysis) in my backyard, July 2022:

Just as Cuckoos lay their eggs within another bird’s nest in order to benefit from the original inhabitant’s parental provisioning, so does the Cuckoo wasp benefit from another insect’s parental provisioning. In the case of this Genus, Chrysis, the female wasp lays her eggs inside the nest of other solitary wasps where the cuckoo wasp larva either feeds on the growing host wasp larva or the host larva’s food supply, placed in the nest by the host wasp parent (O’Neill 2001). The adult cuckoo wasp is well-armoured and can roll into a ball like an armadillo to present this tough shell as a defense against its hosts (Marshall 2006).

Marsh Snipe Fly (Rhagio tringarius) in my backyard, July 2022:

The larvae of Rhagio snipe flies are predators of invertebrates that dwell within the soil, but the adult diet (if they do eat anything) is unknown (Marshall 2012). This species, R. tringarius is introduced from Europe and is possibly replacing the similar native species, R. hirtus (Marshall 2012).

Eastern Cicada-killer Wasp (Sphecius speciosus) on my Parents’ Farm, July 2022:

Cicada-killer wasps are an example of a species that I had encountered significantly in print before encountering in the wild. I had read of their enormous size and strength, so when I spotted giant robust wasps on a visit to my parents’ farm I had my guess that these were the fabled hunters. These are impressive insects, but despite their large size and the males’ territoriality (the males will occasionally dive-bomb humans), they are not actually dangerous to people and should be tolerated and admired, rather than feared. The female can remove up to 1000 times her weight of soil to create her multi-celled nest which she provisions with adult cicadas (all of which used to be included within the genus Tibicen but which have now been moved to several genera (see Hill et. al. 2015 for a recent taxonomic review of the Cicada genus Tibicen)). Each larva is given 1-4 cicadas to feed on, males are given only 1 and female larvae more because females are sometimes 2.5 times larger than males (Evans and O’Neill 2007). The reason for this size disparity is that females do the digging and carry the giant prey items. The cicada-killers cannot carry paralyzed cicadas in flight unless they first drag them to a height and drop, which they will do occasionally in order to transport their large prey (Evans and O’Neill 2007).

Differential Grasshopper (Melanoplus differentialis) in my Parents’ garden, August 2022:

This very large grasshopper can be up to 4.4 cm long and feeds on a variety of plants and crops (Marshall 2006).

Prionyx atratus in my Parents’ garden, August 2022:

Prionyx atratus is a solitary wasp which hunts late-instar* or adult grasshoppers, like the one photographed on the same day in the same garden above. The wasps sting the grasshoppers on the head or thorax, and then construct a burrow in soil for their single prey item. Once the nest is constructed they will place the paralyzed grasshopper inside with an egg attached and close off the nest. While working on the nest, the female hunter will sometimes cache the grasshopper prey nearby (O’Neill 2001). Researching this species led to a rather alarming observation noted in O’Neill 2001: “I have seen the cached grasshopper prey of Prionyx species devoured by other grasshoppers”. It seems that grasshoppers are not always only plant-pests but will consume each other if given the opportunity.

*instar refers to any larval stage between moults, so a late-instar means a larval stage that is close to being an adult.

Northern Leopard Frog (Lithobates  in Long Point, September 2022:

One foggy morning in September, I was out taking photos in Long Point. The main thing I was looking for was birds, but every step I took along the wetland trail was punctuated by the sound and motion of leaping frogs. Taking a closer look at the path, I managed to crouch down and capture some closeups of this Northern Leopard Frog, helpfully sitting very still. 

Common Drone Fly (Eristalis tenax) in my backyard, October 2022:

There comes a time in the year when insect populations begin to go into hiding or die off as Autumn and Winter creep upon the land. Every buzzing, whirring, crawling invertebrate at this time of year gains my attention all the more because I am conscious of the seasons’ turnings that will soon cover the flowers with snow and a hush will fall upon the local pollinators. So in October, I was quite excited to find a small gathering of pollinators right by my back step where an Aster was growing. This photo shows one such late-Fall insect: a Drone Fly.

Orange Sulphur (Colias eurytheme) on my Parents’ Farm, October 2022:

Yet another late-flying insect caught my eye in October, this time a butterfly: an Orange Sulphur. This species of butterfly may or may not overwinter in Ontario. The adult individuals that we see in the Spring are likely migrants from its southern range (which includes Central America and the United States) (Hall et. al. 2014). I’m guessing this means that this individual spotted in the Fall was possibly on its way South to warmer climes.

Dark-eyed Junco (Junco hyemalis) in my backyard, November 2022:

As I prepared to choose at least one photo from every month of the past year, I realized that I didn’t have any photos taken in November. So I rushed outside in my backyard to take some photos of the backyard birds at our feeders. My favourite picture was this of a Dark-eyed Junco. Juncos are familiar and common backyard birds, though they prefer to feed from the ground, rather than directly from the hanging feeders. I feel like this is a perfect species to end with: very common and familiar, found in my own backyard, yet I still find it exciting to see and observe these amazing creatures. I’m looking forward to next year, and can’t wait to see what other species I will wonder at and learn about through 2023.

References:

Ellison, Aaron, Gotelli, Nicholas, Farnsworth, Elizabeth, adn Alpert, Gary. 2012. A Field Guide to the Ants of New England. Yale University Press.

Evans, Howard and O’Neill, Kevin. 2007. The Sand Wasps: Natural History and Behavior. Harvard University Press.

Hall, Peter, Jones, Colin, Guidotti, Antonia, and Hubley, Brad. 2014. The ROM Field Guide to Butterflies of Ontario. Royal Ontario Museum.

Hill, Kathy, Marshall, David, Moulds, Maxwell, and Simon, Chris. 2015. “Molecular phylogenetics, diversification, and systematics of Tibicen Latreille 1825 and allied cicadas of the tribe Cryptotympanini, with three new genera and emphasis on species from the USA and Canada” Zootaxa Vol. 3985 No. 2: 10 Jul. 2015. [you can read the article yourself here: https://www.mapress.com/zootaxa/2015/f/zt03985p251.pdf] DOI: https://doi.org/10.11646/zootaxa.3985.2.3

Marshall, Stephen. 2006. Insects: Their Natural History and Diversity. Firefly Books.

Marshall, Stephen. 2012. Flies: Their Natural History and Diversity. Firefly Books.

Naughton, Donna. 2012. The Natural History of Canadian Mammals. University of Toronto Press.

O’Neill, Kevin. 2001. Solitary Wasps: Behavior and Natural History. Cornell University Press.

Wilson, Joseph, and Carril, Olivia. 2016. The Bees In Your Backyard. Princeton University Press.