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Northern Prairie Wildlife Research Center

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Macromoths of Northwest Forests and Woodlands

Eustroma semiatrata [Geometridae]

JPG-Eustroma semiatrata

Wingspan 3.3 cm. Forewing with a black median band that has a jagged outer margin. This geometrid is common and widely distributed in western North America. Moths fly from spring to fall. Caterpillars feed on the foliage of herbaceous plants such as fireweed (Epilobium).

Similar species: Eustroma fasciata wings are paler in color, typically occurs at the higher elevations in the Cascade Mountains, caterpillars feed on fireweed (Epilobium) and huckleberry (Vaccinium), moths fly in midsummer; Ecliptopera silaceata and Eulithis xylina forewing with a smooth rounded outer margin to the median band.

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