Wallabies range in size from the size of a rabbit to almost 6 ft (1.8 m) long. The soft, woolly fur can be gray, brown, red or almost black. The belly is lighter. Females (called fliers) have a pouch in which the young live and drink milk. Males (called boomers) are larger than females. Babies are called joeys. They have short arms with clawed fingers. strong, legs, and long, four-toed feet with claws. They can hop and jump with their powerful legs.