This bug has been reportedly found in the following regions:
Chino Valley, Arizona , California Las Flores, California Long Beach, California North Fork, California San Diego, California Tulare, California Colorado Springs, Colorado Culver, Indiana Hebron, Kentucky Butte, Montana Los Alamos, New Mexico Kellyville, Oklahoma Gold Hill, Oregon Harbeck-fruitdale, Oregon Carrollton, Texas Irving, Texas Magna, Utah Bell Hill, Washington
On Aug 16, 2006, Magpye from NW Qtr, AR (Zone 6a) wrote:
Wing span: 2 3/4 - 4 inches (7 - 10 cm).
Identification: Upperside of hindwing with upper-most marginal spot yellow or lacking. Underside of forewing with separate yellow spots forming marginal band. Hindwing has narrow marginal spots and no orange tint except for 2 spots near end of inner margin.
Life history: Males patrol canyons or hilltops for receptive females. Females lay eggs singly on surface of host plant leaves. Caterpillars feed on leaves and rest on silken mats in shelters of curled leaves. Chrysalids hibernate.
Flight: One flight from June-July.
Caterpillar hosts: Leaves of cottonwood and aspen (Populus), willows (Salix), wild cherry (Prunus), and ash (Fraxinus).
Adult food: Nectar from many flowers including thistles, abelia, California buckeye, zinnia, and yerba santa.
Habitat: Woodlands near rivers and streams, wooded suburbs, canyons, parks, roadsides, and oases.
Range: Western North America from British Columbia south to southern New Mexico and Baja California; east to western South Dakota and southeast Colorado. A rare stray to central Nebraska.
I've seen two Eastern Tiger Swallowtails in my backyard in the last two weeks, I can't remember seeing one here before. They are absolutely gorgeous! I have a wild cherry tree, so I hope one of them left some eggs on it for my enjoyment next year.