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 |
---|---|
Hind wings absent | Hind wings present or absent |
Abdominal terga 2 and often 6 with median dark spot on anterior margin (also occasionally dark spots on terga 3-5; spots on terga can sometimes be quite faint) | Abdominal terga 2 and 6 not marked as at left |
Abdominal sterna 2-7, 2-6, or 3-6 usually with a distinct single median spot | Abdominal sterna with or without distinct single median spots as at left |
Remaining genera: Acentrella and Heterocloeon | |
4 Example Specimens | |
Iswaeon | Go to Couplet 10 |