Where & When
» Species americanus (American Grannom)
Regions:This species is most prolific in the West and Midwest, but it may still be of concern to fishermen in the East.Hatching BehaviorSpecial thanks to Lloyd Gonzales, author of the excellent new book Fly-Fishing Pressured Water, for helping to sort out the Brachycentrus species and common names.
East, Midwest, WestTime Of Year (?):
July and August
Pictures of 3 Caddisfly Specimens in the Species Brachycentrus americanus:
Brachycentrus 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.
Recent Discussions of Brachycentrus americanus
Brachycentrus americanus on the Lower Sacramento River California
I believe this is the species found in sometimes very large numbers on the Lower Sacramento River in the Redding area. Ten years ago it was present in such large numbers that fishing a fly on the bottom resulted in frequently hooking one of these caddis still in its case. Along with other aquatic insects their numbers have declined to a fraction of once seen. I don't believe the egg Sac dropped by the females to be olive , instread I have seen it to be a bright green. The females seem to oviposit close to the edge of flowing water and not midstream.Reply
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