The dark kangaroo mouse ("Microdipodops megacephalus"), also known as Owyhee River kangaroo mouse, is named for its dark-furred back, long hind feet, and the way it moves around by hopping on its hind legs like Australian kangaroos. It belongs to the order Rodentia and Family Heteromyidae. Its head is large in comparison to its body size due to enlarged auditory bullae. It has a relatively short neck large ears, prominent eyes, a long snout, long whiskers and a fat, haired tail.