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)