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The Specimen

Baetis (Blue-Winged Olives) Mayfly NymphBaetis (Blue-Winged Olives) Mayfly Nymph View 4 Pictures
Collected April 14, 2007 from Cayuta Creek in New York
Added to by on April 22, 2007

The Discussion

EarlfishmanApril 23rd, 2007, 7:05 pm
Posts: 17This one looks like an almost ready to emerge male Baetis sp., but I can't be 100% based on the pictures and I definitely can't go any further than that.

As a side note, if anyone is interested in a good key to the larvae of Baetidae, search google for "EPA photographic Baetidae key" and click on the PDF at the EPA site (direct link to the PDF here). The key has some good photos and works very well for the eastern U.S.
MartinlfApril 24th, 2007, 6:14 am
Palmyra PA

Posts: 3233
Wow, amazing photos.
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell
KonchuApril 24th, 2007, 10:14 am
Site Editor

Posts: 505
Could even be a Pseudocloeon/Labiobaetis species...

Earlfishman: Thanks for the link to the great baetid key!!!
TroutnutApril 24th, 2007, 10:44 am
Bellevue, WA

Posts: 2737
Excellent link Earl! I'll be using that one a lot.

Following it through for this specimen leads me to Baetis too.

Does anyone have the Baetis species key the PDF mentions as the most recent (Weirsema et al 2004)? Is it worth a trip to the library?
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist
KonchuApril 24th, 2007, 6:52 pm
Site Editor

Posts: 505
Worth the trip to the library.

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