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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.

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 Family Neoephemeridae

See Neoephemera, the only genus in this family, for details about these large and uncommon mayflies.

Where & when

In 3 records from GBIF, adults of this family have been collected during June (67%) and May (33%).

In 9 records from GBIF, this family has been collected at elevations ranging from 1220 to 2546 ft, with an average (median) of 2188 ft.

Family Range

Specimens of the Mayfly Family Neoephemeridae

1 Nymph

Start a Discussion of Neoephemeridae

Mayfly Family Neoephemeridae

Genus in Neoephemeridae
Genus in Neoephemeridae: Neoephemera
Family Range
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