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Northern Prairie Wildlife Research Center

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Caterpillars of Pacific Northwest
Forests and Woodlands

Orgyia pseudotsugata [Lymantriidae]


Densely covered with white hairs that originate from a red base; middorsal tufts of golden-tipped white hairs on A1-A4 and A8; tufts of long black hairs project forward laterally from A1; a single tuft of long black hairs project backward dorsally from A8; bright red middorsal glands on A6 and A7. This species is an occasional pest on conifers, notably Douglas-fir, during May and June.


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Return to Photo Key to Species in Group B-2a - Middorsal tufts of short, dense hairs

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