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 |
---|---|
Tibiae with several pairs of stout, spur-like setae (sf 19.317) | Tibiae each with only 1 pair of stout, spur-like setae at apex (sf 19.318) |
Remaining genera: Allocosmoecus and Dicosmoecus | Remaining genera: Amphicosmoecus, Eocosmoecus, and Onocosmoecus |
3 Example Specimens | |
Go to Couplet 37 | Go to Couplet 38 |