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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Byhaugh on Feb 19, 2014February 19th, 2014, 2:55 pm EST
Ok, please settle an argument. Which is the larger insect: Salmonfly or Hexagenia?
Thanks,
Byron
Thanks,
Byron
Entoman on Feb 19, 2014February 19th, 2014, 3:33 pm EST
Hi Byron -
The Salmonfly is much larger. While some strains of Hex females can approach 40mm body length and some strains of Salmonfly males can be in the 30mm range, the latter are still substantially bulkier. With more typical strains and with gender differences aside those length ratios are reversed making the size difference even more dramatic.
The Salmonfly is much larger. While some strains of Hex females can approach 40mm body length and some strains of Salmonfly males can be in the 30mm range, the latter are still substantially bulkier. With more typical strains and with gender differences aside those length ratios are reversed making the size difference even more dramatic.
"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
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