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Troutnut Forum > Get Bugs Identified > Biggest Mayfly

Al514September 17th, 2007, 9:29 pm
Central New York

Posts: 38
What is the biggest mayfly species in the North East? I was at a 7 to 8 acre pond tonight that holds some nice trout, and I swear I saw some spinners about size 8 or 6! I had to do a double-take to make sure it was a mayfly! I didnt have my camera, so no pictures but Ill try and get some soon. It looked dark brown and around 2, possibly 3 inches in length.
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Replies:
Al514September 17th, 2007, 9:32 pm
Central New York

Posts: 38
Ok, so I originally thought it was Hex, but I didn't think they were that big. After looking at the pictures on here, I'm sure it was a Hex.
TaxonSeptember 17th, 2007, 10:45 pm
Mercer Island, WA

Posts: 476
There are only three mayfly genera with really large mayflies, which I would describe as being in excess of 1" in length, as measured from the front of head to end of abdomen, exclusive of tails.

These are Ephemera, Hexagenia, and Litobrancha, all burrowers in family Ephemeridae. Of those three genera, only Hexagenia are found in ponds.
Roger Rohrbeck
www.FlyfishingEntomology.com
TroutnutSeptember 18th, 2007, 2:17 am
Fairbanks, AK

Posts: 1112
At this time of year, it was probably a different species of Hex, like Hexagenia atrocaudata. Check out the pics of that one on this site and see if they match a little closer still.
Jason Neuswanger
The Troutnut
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