AKA Lycaena nivalis
Size: 1 - 1.25 inches wingspan
Key ID features: Male above brownish with orange zigzag line on trailing margin. Female above light orange with black spots and borders. HW below two-toned, creamy yellow next to the body, and lilac in the outer half, with vague zigzag orange line (colors brighter in female).
Similar species: Purplish lacks distinctive two-toned HW below. Other coppers have white or grayish undersides.
Host plant: Knotweeds (Polygonum).
Habitat: Mountain meadows, openings in fir and pine forests.
Range: All of Oregon's mountains except Coast Range.
Season: Mid-May to late August
Conservation Status: Secure