As many pictures as I have of mayflies on this site, there still seems to be some confusion between mayflies and muffleheads. I don't quite understand how, but hey, not everyone's into bugs. I will try to clear that up right now so watch and listen up, folks!
Muffleheads usually show up one to two weeks before the mayflies and are alot smaller than mayflies. They are slightly larger than mosquitos but will not bite you. They also have fuzzy little antennae.
These great photos were submitted by Gwen DeBoard of Columbus, Ohio. The first one is a closeup shot of muffleheads. She took them in Geneva, Ohio at the Geneva State Park Beach by the restroom walkway on June 6th, 2009.
"I was on that Beach until the sun went down, I didn't see one Mayfly, but we did see thousands of muffleheads..... I looked up in the sky and saw & heard swarms. It was amazing! And the sound was incredible! Loud humming like bees."
It's hard to believe because they're so small, but I supposed if you get that many mufflehead all flying at once, they're bound to make some kind of noise.
Now, if you'll notice, folks, there's no wings sticking up and no long tail. Yes, they can swarm like mayflies but you won't have them hanging around smelling like dead fish all over the place. They are a lot less of a nusiance than the mayflies.
That is about it. Do we know the difference now? Good... class dismissed!! And thanks for your help, Gwen!