Size: Up to 1.5 inch wingspan

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Key ID features:  Above, orange with black spots, checks and borders. Females have wider black border above. Fringes checked.  HW above with submarginal band of small black dots circled with orange, on males this is below large unmarked orange patch.  HW below cream, tan and brown bands and patches, and bright marginal crescent below midpoint, haloed with brown.

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

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Host plant: Mostly thistles, including Cirsium arvense (Canada thistle).

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Habitat: Prairies, weedy fields, meadows, roadsides, marshes.   

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Range: All of Oregon.

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Season: Late February to mid-October

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Abundance: Common 

 

Conservation Status: Secure