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

Blue-winged Olives
Baetis

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.

Stream photos

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Skwala (Large Springfly) Stonefly Nymph Skwala (Large Springfly) Stonefly Nymph

Dorsal view of a Skwala (Perlodidae) (Large Springfly) Stonefly Nymph from the Yakima River in Washington

This Skwala nymph still has a couple months left to go before hatching, but it's still a good representative of its species, which was extremely abundant in my sample for a stonefly of this size. It's obvious why the Yakima is known for its Skwala hatch.

6 Recently Added Photos

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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Caddisfly Species Leptocerus americanus

Where & when

Time of year : June and July

Preferred waters: Lakes and ponds

In 80 records from GBIF, adults of this species have mostly been collected during July (36%), June (35%), May (16%), and August (9%).

In 25 records from GBIF, this species has been collected at elevations ranging from 430 to 6972 ft, with an average (median) of 860 ft.

Species Range

source

Map of specific collection sites

Hatching behavior

Gary LaFontaine reports in Caddisflies that the emerging pupae are very important on some eastern spring ponds.

Larva & pupa biology

Current speed: Still

Substrate: Vegetation

Shelter type: Silk

Start a Discussion of Leptocerus americanus

References

LaFontaine, Gary. 1981. Caddisflies. The Lyons Press.