The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.
Dr. George Roemhild explained to me how he finds these winter caddisflies in February and March: "They crawl up on the snowbanks, but when the sun hits their dark wings they melt down out of sight. That's how I collect them, by walking along looking for holes in the snow."
In 117 records from GBIF, adults of this genus have mostly been collected during October (18%), April (15%), May (14%), September (11%), March (11%), November (9%), June (5%), and December (5%).
In 50 records from GBIF, this genus has been collected at elevations ranging from 34 to 11499 ft, with an average (median) of 5719 ft.
Diet: Leaf matter, algae, dead animals