Eastern Tiger Swallowtail
Papilio glaucus

f22 @ 1/400s, ISO:2000, Nikon D3S w 105mm macro

"Papilio glaucus," Wikipedia, the free encyclopedia. P. glaucus is found in the eastern United States from southern Vermont to Florida west to eastern Texas and the Great Plains. It is common throughout its range, although is rarer in southern Florida and absent from the Florida Keys. In 1932, a single specimen was collected in County Wicklow, Ireland. It is believed to have been an accidental introduction from North America.
Frances A. Crane Wildlife Management Area, East Falmouth, Massachusetts