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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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True Bug Family Nepidae (Water Scorpions)

Where & when

In 537 records from GBIF, adults of this family have mostly been collected during July (14%), June (13%), September (13%), August (12%), October (11%), April (10%), May (9%), March (6%), and November (6%).

In 18 records from GBIF, this family has been collected at elevations ranging from 59 to 5971 ft, with an average (median) of 777 ft.

Family Range

Specimens of Water Scorpions:

1 Adult

Start a Discussion of Nepidae

True Bug Family Nepidae (Water Scorpions)

Genus in Nepidae
Genus in Nepidae: Ranatra
2 genera (Curicta and Nepa) aren't included.
Family Range
Common Name
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