Cracker butterflies are a neotropical group of medium-sized brush-footed butterfly species of the genus Hamadryas. They acquired their common name due to the unusual way that males produce a "cracking" sound as part of their territorial displays.
Queen Alexandra's Birdwing (Ornithoptera tithonus) of the family Papilionidae. The female of this species is the largest butterfly in the world with a wingspan in excess of 30 cm. It is found in New Guinea.