Heliconius erato (Side View)
(I.D. courtesy of Danny Burk)

I was fortunate that this same butterfly gave me a chance for a profile shot as well. Canon 100-400 at 400 mm, ISO 400, f/16, 1/200 second (manual mode), 550EX Flash with Stofen Omnibounce (flash EV +2/3), Wimberley Sidekick/Arca Swiss Ballhead/Bogen-Manfrotto monopod.