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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.

Sweltsa onkos (Sallfly) Stonefly Adult Pictures

This stonefly was collected from Mystery Creek #62 in New York on May 15th, 2007 and added to Troutnut.com by Troutnut on May 18th, 2007.

Discussions of this Adult

Ontario Sallfly
Posted by GONZO on Sep 9, 2008
Last reply on Sep 9, 2008 by GONZO
I believe this is probably Sweltsa onkos. There are three Sweltsa species commonly listed for most of the Northeast (onkos, naica, and lateralis), and their individual pronotum/head markings seem rather distinctive.

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