Danaus plexippus

f20 @ 1/320s, ISO:1250, Nikon D3S w 105mm macro

"Monarch," Wikipedia, the free encyclopedia. The monarch has six legs like all insects, but uses only its middle legs and hindlegs as the forelegs are vestigial, as in all other Nymphalidae, and held against its body.
Francis A. Crane Wildlife Management Area, East Falmouth, Massachusetts