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 |
---|---|
Larvae have short, marginal, hairlike setae on the heads, legs, and tergites | Marginal setae not well developed on the heads, legs, and tergites |
No long setae protruding dorsally from tergites 8 and 9 | Long setae protrude dorsally from the anterior margins of tergites 8 and 9 |
Relatively many denticles on tarsal claws, and positioned along the length of the claw | Relatively few denticles on tarsal claws, positioned basally |
Remaining species: Drunella tuberculata and Drunella walkeri | |
Drunella allegheniensis | Go to Couplet 9 |