Hamadryas amphinome, the red cracker, is a species of cracker butterfly in the family Nymphalidae. Hamadryas amphinome, the red cracker, is a species of cracker butterfly in the family Nymphalidae. Hamadryas amphinome, the red cracker, is a species of cracker butterfly in the family Nymphalidae. All of the butterflies in the genus Hamadryas are known as crackers. They earned this name because they are actually able to create a sound which is audible to humans. It is believed that the crackling sound they create while flying is used for territory defense and as part of a courtship behaviour.