Blue-winged Olives
Baetis
Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.
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Nymphs of this species were fairly common in late-winter kick net samples from the upper Yakima River. Although I could not find a key to species of Zapada nymphs, a revision of the Nemouridae family by Baumann (1975) includes the following helpful sentence: "2 cervical gills on each side of midline, 1 arising inside and 1 outside of lateral cervical sclerites, usually single and elongate, sometimes constricted but with 3 or 4 branches arising beyond gill base in Zapada cinctipes." This specimen clearly has the branches and is within the range of that species.
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See the forum comments for notes on the identification of this specimen.
DMM
Posts: 34
Posts: 34
DMM on Apr 22, 2007April 22nd, 2007, 5:53 pm EDT
This is a uenoid. I know the genus, but I can't think of it now...sorry, I'll try to remember to look it up if no one else knows it.
David
Taxon on Apr 22, 2007April 22nd, 2007, 6:47 pm EDT
David-
Probably Neophylax (Autumn Mottled Sedge). This genus has four species in NY. Most likely it’s N. concinnus, as this is the only one (of those four) that Gary LaFontaine considered to be sufficiently important to flyfishers to include in his book. However, the other NY resident species are N. consimilis, N. fuscus, and N. oligius.
Probably Neophylax (Autumn Mottled Sedge). This genus has four species in NY. Most likely it’s N. concinnus, as this is the only one (of those four) that Gary LaFontaine considered to be sufficiently important to flyfishers to include in his book. However, the other NY resident species are N. consimilis, N. fuscus, and N. oligius.