© Cathy Cook

Anne U White Trail, Boulder County

Appearance: Above boldly colored black and yellow with four broad black stripes crossing the forewing and the innermost stripe continuing across the hindwing. Also the trailing edges of both wings have broad black margins with yellow crescents. Beneath paler yellow with the same black stripe pattern visible and blue edging on the wings. Hindwings have long tails. Notice entire body is also patterned in black and yellow.

Size: Large,2-1/2 to 4 inches

Habitat: Woodlands near streams and other open areas often near water.

Season: June to mid-August

Larval Foodplant: Leaves of a wide variety of shrubs and trees such as chokecherry, willow, alder, aspen and cottonwood.

Did You Know...
Easily noticed and conspicuous in flight, the Western Tiger Swallowtail can be joined in flight during the summer months with companions like the Pale, Anise and the Two-Tailed Swallowtails.