Header image
Enter a name
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.

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.

Caddisfly Species Glossosoma nigrior (Saddle-case Makers)

This is an important caddisfly in the East and Midwest, and the most abundant species in the entire order on some waters. Its small size (hook size 20-22) makes it less significant than larger abundant species.

Where & when

Time of year : May through June

In 68 records from GBIF, adults of this species have mostly been collected during May (25%), June (24%), July (21%), August (13%), and September (9%).

In 46 records from GBIF, this species has been collected at elevations ranging from 95 to 5103 ft, with an average (median) of 1234 ft.

Species Range

Hatching behavior

Time of day : Evening

Egg-Laying behavior

Time of day: Evening

Larva & pupa biology

Substrate: Gravel

Discussions of Glossosoma nigrior


Start a Discussion of Glossosoma nigrior

References

Caddisfly Species Glossosoma nigrior (Saddle-case Makers)

Taxonomy
Species Range
Common Name
Troutnut.com is copyright © 2004-2024 (email Jason). privacy policy