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Northern Prairie Wildlife Research Center

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Macromoths of Northwest Forests and Woodlands

Dysstroma sobria [Geometridae]

JPG-Dysstroma sobria

Wingspan 3.8 cm. Forewing with a white median band and dark brown basal and postmedian bands. This species is less common than most other Dysstroma and is limited to forests of the Pacific West. Moths fly in midsummer. Caterpillars feed on foliage of salal (Gaultheria shallon) and rhododendron (Rhododendron macrophyllum).

Similar species: Dysstroma ochrofuscaria forewing with a large yellow-orange apical patch, caterpillars feed on foliage of hazelnut (Corylus cornuta); Dysstroma truncata is smaller, forewing with reddish basal and postmedian bands, widely distributed in western North America, caterpillars are generalist feeders on foliage of flowering trees and shrubs.

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