Ulysses butterfly (Papilio ulysses), also know as the blue mountain swallowtail, the blue emperor, and the mountain blue, is a spectacular Australian butterfly. The male is an iridescent blue-green with a dark background. The female is more subdued in color. They have a wingspan of about 5.5 inches (14 cm). Both have a long "swallowtail." Males are attracted to most blue objects (mistaking them for females). There are 16 known subspecies. The Ulysses butterfly inhabits a portion of northeastern Australia (eastern Queensland) in tropical rainforest areas and suburban gardens. They are also found in other places like New Guinea, the Moluccas, Bismarck Archipelago and northwestern Solomon Islands.