Very similar to P. glaucus, except ventrally the hind wings lack marginal orange spots.(1)
Larvae very similar to those of Pale Tiger Swallowtail, but black pupil of false eye-spot larger, and yellow spot inside eyespot entirely separated from it, not just notched.
Range
Western North America east to the edge of the Rocky Mountains.(1)
Habitat
Woodlands and more open areas, often near streams. Also common in cities and suburbs due to the popularity of sycamores in landscaping.
Season
June-July (one flight) in much of range, but much of year (2-4 flights) along Pacific coast.
Food
Adults take nectar.
Life Cycle
Males patrol canyons and hilltops. Larvae feed on foliage of deciduous trees, including cottonwood, birch, elms, willow, alder, sycamore, and aspen (1). They rest in shelters made of silk and curled leaves. Overwinters as pupa (chrysalis).
