
This was one of maybe a dozen winged insects, of different sizes and apparent stages of development, adhered to a rock in Babbling Brook (the stream that leaves Ward's Pond and becomes the Muddy River). I thought maybe they were very slowly emerging imagos (adult insects) and pupae. I sent this picture to an insect id community and mostly they were stumped too. The best explanation I got was that these were female
caddisflies which had died shortly after laying eggs in the water. The white growth (someone supposed) was a fungus consuming the dead insects' bodies. It seems plausible to me.
I tried to figure out if this was a normal part of the caddisfly life cycle, but I couldn't tell. Interestingly, there's a lot of information about caddisflies online from the perspective of people who make pretend insects with which to catch fish. They had some good things to say, but I didn't get my questions answered. The log cabin caddsfly entry I did for the 365 project (click above link) included pictures of caddisfly larvae collected a short distance downstream from the mystery insects.
Anyone else have any bright ideas?