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Northern Prairie Wildlife Research Center

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Macromoths of Northwest Forests and Woodlands

Dysstroma formosa [Geometridae]

JPG-Dysstroma formosa

Wingspan 3.1 cm. Forewing with a gray median band and a dark brown basal band. Moths are abundant east of the Cascade Mountains, widely distributed in western North America. Moths fly in midsummer. Caterpillars feed on the foliage of currant and gooseberry (Ribes).

Similar species: Dysstroma mancipata occurs in forested habitats west of the Cascade Mountains; Dysstroma walkerata occurs in subalpine forests in the Cascade Mountains.

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