Heliconius erato (hybrid)
(I.D. courtesy of Danny Burk)

The dark color of this specimen made it difficult to expose correctly, but I was finally able to get it close. Canon 100-400 at 400 mm, ISO 200, f/16, 1/200 second (manual mode), 550EX Flash with Stofen Omnibounce (flash EV +2/3), Wimberley Sidekick/Arca Swiss Ballhead/Bogen-Manfrotto monopod.