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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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.
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ARMIke on Aug 21, 2018August 21st, 2018, 6:02 am EDT
Just joined the forum and looking forward to some great topics!
Wbranch on Aug 21, 2018August 21st, 2018, 11:25 am EDT
Welcome Mike!
Catskill fly fisher for fifty-five years.
Flyguide1 on Aug 21, 2018August 21st, 2018, 2:23 pm EDT
Hello from east tn!
Adirman on Aug 21, 2018August 21st, 2018, 11:20 pm EDT
Welcome Mike, great to have you aboard:)