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Close-up photo of live female Western White (Pontia occidentalis) dorsal view

Eagle Cap Wilderness, Wallowa Co, Aug 26 - female

Western White

Pontia occidentalis

Size: 1.25 - 1.75 inches wingspan

Key ID features:  Above, male white with black or gray markings on forewing, female has more extensive markings on both wings. Below dark overscaling creates gray-green margins along hindwing veins, darker in spring.

Similar species:  Co-occurs with Checkered White in SE Oregon. Difficult to ID in flight, may need to find nectaring or use net. Female Checkered White is less sharply marked, often with olive or brown shades instead of gray-black.


Host plant: Many native species in the mustard family.

Habitat: Open habitats, including woodland openings, mountain meadows, and barren areas above tree line.

Range: Throughout Oregon west of the Coast Range.

Season: Mid-March to mid-September

Abundance: Common


Conservation Status: Secure

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