The Atlas Moth Attacus atlas) is believed to be the largest species of moth with wing spans that may reach 25–30 cm (10–12 in). We were told by one of the guides at the Conservatory that they mate for hours... they have no mouths so cannot eat... they do nothing except mate, lay eggs and then die. The female is the larger of the species and is mostly hidden behind the male in this close view that shows the lovely, feathery antennae of this species. Refer to Wikipedia for additional information.
I visited the Butterfly Conservatory of the American Museum of Natural History in New York, NY twice to get this picture... the first day we were there, they were mating on a glass window too far away for capturing and I didn't have my macro lens anyway. The next day, they had relocated (maybe it was even a different pair) to a MUCH better location AND I had my macro lens with me.