Size: Up to 1.75 inch wingspan

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Key ID features:  Large and plain. Above, tan-orange with graduated dark border. Male with black stigmata on FW, female with light spot band on FW. HW below plain pale tan.

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Similar species: Large size and unmarked pale tan HW below distinct.

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Host plant: Primarily American common reed (Phragmites australis ssp. americanus).

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Habitat: Near stands of reeds along streams, seeps and marshes in alkaline lowlands. 

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Range:  Summer Lake area in Lake County, Imnaha River canyon in Wallowa County.

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Season: Early July to early September

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Abundance: Uncommon

 

Conservation Status: Secure