Macromoths of Northwest Forests and Woodlands

Spilosoma vagans [Arctiidae]

Wingspan 3.8 cm. Wing coloration ranges from orange-red to gray-tan. This arctiid is common and widely distributed in western North America, often abundant in the Blue Mountains. Moths fly in spring to early summer. Caterpillars are generalist feeders on foliage of herbaceous plants.

Similar species: Spilosoma pteridis is smaller with darker pigmented wings.

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