Two-tailed Swallowtail (Papilio multicaudata)

Male. White River Falls, Oregon. 5/7/18

Female. Near Coyote Creek Rd, Ochocos, E of Prineville, Oregon. 6/22/18

Female. Steens Mountain, Harney County, Oregon. 7/13/19

Female. Lower Klickitat, Klickitat County, Washington.

Note: Key characteristics include the large size and the two tails. The male shows distinctive narrow black lines, but the lines on a female are wider and harder to distinguish from the Western Tiger Swallowtail. The female has a double line near the trailing edge of the forewing while the male has a single bold line.