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Northern Prairie Wildlife Research Center

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Caterpillars of Pacific Northwest
Forests and Woodlands

Arctia caja [Arctiidae]


Thoracic hairs mostly reddish orange; dorsal abdominal hairs white, lateral hairs reddish orange. This caterpillar is common on herbacious plants such as vetch and grasses. It is present in fall and overwinters, completing development by May or June.


Previous Section -- Fall Webworm
Return to Photo Key to Species in Group B-2a - At least half covered in long hairs
Next Section -- Platyprepia virginalis [Arctiidae]

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