Size: Up to 2 inch wingspan

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Key ID features:  Above, orange patches and bands separated by black, much lighter in males. FW fringes checked, HW fringes white.  HW above with submarginal band of small black dots circled with orange. Males especially have squarish black bar at middle of FW trailing edge above. Below white, tan and brown bands and patches.

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Similar species: Pale Crescent is larger than Field or Mylitta. Mylitta lacks squarish black bar at trailing edge of FW above.

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Host plant: Thistles including Cirsium undulatum.

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Habitat: Dry foothill gullies, streamsides and canyons.   

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Range: Lower Deschutes River basin, Snake River basin.

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Season: Mid-April to early August

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Abundance: Common 

 

Conservation Status: Secure