Siphlonurus phyllis, Siphlonuridae, male
Missoula, MT
May 9, 2017
Robert Niese
I know relatively little about aquatic macro-invertebrates, but they are a very well-studied group of organisms due to their importance in understanding stream ecology and health. Fly fishermen are also avid naturalists of these bugs. I’ve met anglers who follow the hatch dates and times of aquatic insects more closely than manic listing birders! Apparently, this genus of mayfly is one of only a few that swarms by the thousands here in the west.
Northwest Naturalist 