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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This one was surprisingly straightforward to identify. The lack of a sclerite at the base of the lateral hump narrows the field quite a bit, and the other options followed fairly obvious characteristics to Clostoeca, which only has one species, Clostoeca disjuncta.
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Definition of 'furcula'
Definition of 'furcula'
Furcula: A forked process. The term is typically used in reference to specific structures, which vary in location and composition across different types of insects.
This other word references the same concept: furculae.
This other word references the same concept: furculae.