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.
Featured on the forum
As far as I can tell, this species has only previously been reported from one site in Oregon along the Columbia gorge. However, the key characteristics are fairly unmistakable in all except for one minor detail:
— 4 small yellow spots on frons visible in photos
— Narrow occipital spinule row curves forward (but doesn’t quite meet on stem of ecdysial suture, as it's supposed to in this species)
— Short spinules on anterior margin of front legs
— Short rposterior row of blunt spinules on abdominal tergae, rather than elongated spinules dorsally
I caught several of these mature nymphs in the fishless, tiny headwaters of a creek high in the Wenatchee Mountains.
— 4 small yellow spots on frons visible in photos
— Narrow occipital spinule row curves forward (but doesn’t quite meet on stem of ecdysial suture, as it's supposed to in this species)
— Short spinules on anterior margin of front legs
— Short rposterior row of blunt spinules on abdominal tergae, rather than elongated spinules dorsally
I caught several of these mature nymphs in the fishless, tiny headwaters of a creek high in the Wenatchee Mountains.
Troutnut is a project started in 2003 by salmonid ecologist Jason "Troutnut" Neuswanger to help anglers and
fly tyers unabashedly embrace the entomological side of the sport. Learn more about Troutnut or
support the project for an enhanced experience here.
Crepuscular on Jul 2, 2013July 2nd, 2013, 7:14 am EDT
Sorry for the crappy photos all I had was my phone
Collected 7/2/2013.
Dauphin County PA Susquehanna River
23mm
Female H. bilineata I guess, I don't recall ever seeing one before.
Collected 7/2/2013.
Dauphin County PA Susquehanna River
23mm
Female H. bilineata I guess, I don't recall ever seeing one before.
Martinlf on Jul 4, 2013July 4th, 2013, 4:57 am EDT
Wow! Cool.
"He spread them a yard and a half. 'And every one that got away is this big.'"
--Fred Chappell
--Fred Chappell
Entoman on Jul 10, 2013July 10th, 2013, 11:23 pm EDT
Looks like bilineata to me too, Eric. Spieth documented both the unique tergal markings and the black coloration in his '41 paper. The variability in this genus never ceases to amaze me.
"It's not that I find fishing so important, it's just that I find all other endeavors of Man equally unimportant... And not nearly as much fun!" Robert Traver, Anatomy of a Fisherman