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Blue-winged Olives

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.

Mayfly Genus Fallceon (Blue-Winged Olives)

Species of the Fallceon genus can be identified by having typical Baetis dark or olivaceous coloration and the hooked process on its hind wings of Anafroptilum (prev. Centroptilum). This genus has only two species of possible interest to anglers:

Fallceon quilleri - a former species of Baetis that has had eight former Baetis species synonymized with it. It has a continental distribution.
Fallceon thermophilos - a former species of Baetis that has had one species from Baetis synonymized with it. It has a Northwest distribution.

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» Genus Fallceon (Blue-Winged Olives)
7 species (Fallceon eatoni, Fallceon fortipalpus, Fallceon longifolius, Fallceon quilleri, Fallceon sageae, Fallceon sonora, and Fallceon thermophilos) aren't included.
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