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.

For how many years, I wonder, have these huge slabs of rock sheltered wild brook trout?

From Mystery Creek # 89 in New York

Stream photos

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Limnephilus (Summer Flier Sedge) Caddisfly Larva Limnephilus (Summer Flier Sedge) Caddisfly Larva

Case view of a Limnephilus (Limnephilidae) (Summer Flier Sedge) Caddisfly Larva from the Yakima River in Washington

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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.

Troutnut is a project started in 2003 by salmonid ecologist Jason "Troutnut" Neuswanger to help anglers and fly tyers unabashedly embrace the entomological side of the sport. Learn more about Troutnut or support the project for an enhanced experience here.

Stonefly Species Taeniopteryx nivalis (Early Black Stoneflies)

Where & when

Time of year : Late February to mid-March

This is the most common early black stonefly in the East.

In 49 records from GBIF, adults of this species have mostly been collected during March (57%), April (22%), and February (12%).

In 1 record from GBIF, this species has been collected at elevation of 1336 ft.

Species Range

source

Map of specific collection sites

Specimens of the Stonefly Species Taeniopteryx nivalis

1 Nymph

Taeniopteryx nivalis (Early Black Stonefly) Stonefly Nymph

2 Pictures

Dorsal view of a Taeniopteryx nivalis (Taeniopterygidae) (Early Black Stonefly) Stonefly Nymph from unknown in Wisconsin

I found this nymph wriggling in the surface film during a hatch of related Strophopteryx adults. This nymph died in transport so it's not alive in the photos, but it's pretty close to its live colors.

Collected March 17, 2004 from unknown in Wisconsin

Added by Troutnut on January 25, 2006

Collected March 17, 2004 from unknown in Wisconsin and added by Troutnut on January 25, 2006

Start a Discussion of Taeniopteryx nivalis

References

Swisher, Doug and Carl Richards. 2000. Selective Trout. The Lyons Press.