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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Dorsum of thorax and abdomen with a mesal, longitudinal row of long, fine, silky setae (best seen in lateral view) | No mesal longitudinal row of silky hairs on thorax and abdominal dorsum |
Abdominal sternum 7 usually with incomplete posterior fringe | Abdominal sternum 7 usually with a complete posterior fringe |
2 Example Specimens | 3 Example Specimens |
Doroneuria | Calineuria Species Calineuria californica |