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American Grannoms

This common name refers to only one species.

Caddisfly Species Brachycentrus americanus

These are pretty much always called American Grannoms.
Brachycentrus americanus (American Grannom) Caddisfly LarvaBrachycentrus americanus (American Grannom) Caddisfly Larva View 13 PicturesBoth the genus ID (Merritt & Cummins) and species ID (Flint 1984) are pretty confident for this larva, a nice example of a common western caddisfly. It was by far the most abundant insect in my kicknet sample on this trip, and many of the rocks in the fast riffle where I sampled had dozens of these larvae clinging on.
Collected July 6, 2020 from in
Added to by on July 12, 2020
Female Brachycentrus americanus (American Grannom) Caddisfly AdultFemale Brachycentrus americanus (American Grannom) Caddisfly Adult View 1 PicturesSize 11 mm. Prior to this photo the specimen dropped its large egg mass that was a very dark (almost black) olive sphere almost twice the diameter of the abdomen. Notice the abdomen visible through the wings is both thickened and shortened post egg drop.
Collected October 15, 2011 from in
Added to by on October 21, 2011
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