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Caddisfly Species Brachycentrus numerosus (Dark Grannom)

In Caddisflies, Gary LaFontaine attributed the famous spring hatch on the Beaverkill (now known as the "Apple Caddis") to this species. After that publication, entomologists described that major hatch as a new species -- Brachycentrus appalachia.

Brachycentrus numerosus is probably still important in many locations.

Where & When

Regions: East, Midwest

Time Of Year (?): May

Hatching Behavior

Time Of Day (?): Afternoon

Egg-Laying Behavior

Time Of Day: Evening

Special 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.

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