Western White

Pontia occidentalis
Whites

Appearance: Very similar to and difficult to separate from Checkered White. Generally white above with a central black bar on leading edge of forewing. Marginal chevrons tend to be gray while submarginal spots tend to be darker. Males tend to be more lightly marked than females. Below, yellow-green veining on forewing apex and hindwing.

Size: Small; 1 3/8 to 1 5/8 inches

Habitat: Upper foothills through alpine tundra; open meadows and parks

Season: Spring to fall; 2 broods, 1 at higher elevations

Larval Foodplant: Mustards

Did You Know…
“The Western White hilltops, rambles and roams and can turn up in virtually any locality” (Pyle, 2002).

Species Gallery (click to enlarge)