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Lateral view of a Male Baetis (Baetidae) (Blue-Winged Olive) Mayfly Dun from Mystery Creek #43 in New York
Blue-winged Olives

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.

Dorsal view of a Kogotus (Perlodidae) Stonefly Nymph from Mystery Creek #199 in Washington
This one pretty clearly keys to Kogotus, but it also looks fairly different from specimens I caught in the same creek about a month later in the year. With only one species of the genus known in Washington, I'm not sure about the answer to this ID.
27" brown trout, my largest ever. It was the sub-dominant fish in its pool. After this, I hooked the bigger one, but I couldn't land it.
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Mayfly Genus Neoleptophlebia

This genus was created somewhat recently from species, including some important to anglers, that were formerly grouped in Paraleptophlebia.

Where & when

In 39 records from GBIF, adults of this genus have been collected during June (54%), July (15%), April (13%), May (13%), and August (5%).

In 18 records from GBIF, this genus has been collected at elevations ranging from 3 to 10387 ft, with an average (median) of 6565 ft.

Genus Range

Specimens of the Mayfly Genus Neoleptophlebia

3 Male Duns
2 Female Duns
8 Male Spinners
12 Nymphs

1 Streamside Picture of Neoleptophlebia Mayflies:

Start a Discussion of Neoleptophlebia


Mayfly Genus Neoleptophlebia

Genus Range
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