Here’s a snow midge I found a few days ago at Hildacy Farm Preserve. I’m not positive about the species, but perhaps Diamesa nivoriunda. I only saw one, but related members of the genus are reported to swarm during the winter.
What I’d love to know is why the halteres are yellow. They seem to be yellow on majority of diptera I’ve seen, and I’ve never stumbled onto a paper discussing why that is. All I could find was the sentence “Haltere color is often used to distinguish between species” in a Drosophila book .” If you know of a paper, please send link ASAP. Am dying of curiosity.
I was out looking for the elusive snow fly yesterday but found this, instead: an eastern stonefly (Allocapnia recta), a member of the Capniidae (small winter stoneflies). At least that’s what I think it is. Larvae are active during the winter, and adults can fly and mate even when temperature is in the teens. Pretty incredible to see them flitting around on a cold day when other insects cannot even move. At Hildacy Farm in Media, PA. Probably emerged from the nearby Crum Creek.
Here are some photographs of a nursery web spider (Pisaurina mira) along with approximately 75 newly hatched spiderlings. She guards the hatchlings until they are older. The adult was a thing of beauty, especially when viewed large so you can see the hairs. There was a red milkweed beetle head on a nearby leaf, and the plant itself was devoid of anything but spiders. Hunting spiders like this one probably don’t help monarch populations.
I’ve never seen them do it, but apparently the adults are completely comfortable on water, and can even submerge themselves if threatened. They’re related to fishing spiders, so that’s not a complete surprise.
Photographed at Natural Lands Trust’s Hildacy Farm Preserve in Media, Pennsylvania. I can’t find any information on whether this species is native to North America, other than finding it listed on invasive.org. The species also is distributed in western Europe.