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Northern Prairie Wildlife Research Center

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Caterpillars of Eastern Forests

Fall Webworm (Hyphantria cunea)

JPG-Photo of Fall Webworm

Highly variable from green to smoky black, with abundance of long, silky pale setae. Most setal clusters with at least 1 very long seta twice length of others. Sides usually lighter with yellow, orange, and black pattern. Setae frequently borne from raised yellow, orange, or black bumps. Spiracles white. Tents envelop branch tips while those of eastern tent caterpiller confined to crotches. Food: over 100 forest hardwoods. Caterpillar: May to October in South where it has 2 or more generations, August to October in North.

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