Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.
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