07-28-2009, 04:55 AM
I'm by no means an expert on Mayfly identification, but today I encountered a real monster and I don't know what it is. they were just sitting on the outside wall of a building in Idaho Falls this morning. I tried to figure it out and I think it might be a Hexagenia, but if anybody else knows better I'd appreciate some feedback. The picture isn't the best but it's a start. The mayfly is 24 mm long without the tails (there were 2 by the way), and yellow and brown in color.
[signature]
[signature]