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.
Option 1 | Option 2 |
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Short, basally detached marginal intercalary veins present between primary wing veins along entire outer margins of fore- and hind wings | Such intercalary veins absent, but occasionally with a small unattached marginal vein occurring irregularly along wing margins; most marginal intercalary veins attached to other veins |
Male forceps with one short terminal segment | Male forceps with two or three short terminal segments |
5 Example Specimens | 5 Example Specimens |
Ephemerellidae | Leptophlebiidae |