Size: 2.25 - 3 inches wingspan

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Key ID features:  Above, white, gray/translucent wings with red spots, and all-black or nearly all-black antennae. Same general pattern below, but HW below often has additional red patches basally, and red spots in the median area usually have pink centers. 

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Similar species:  Mountain Parnassian (Parnassius smintheus), which is smaller, and has boldy black/white barred antennae.

 

Host plant: Pacific Bleeding Heart (Dicentra formosa).

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Habitat: Mountain meadows and moist, open mountain woodlands, occasionally in lowlands.

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Range: Western Oregon, Blue Mountains, Ochocos, Warner Mountains.

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Season: late May to late August

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Abundance: Common

 

Conservation Status: Secure