They have small front legs, each armed with five digits ending in a sharp claw. The hind legs are extremely powerful ending in four digits. The foot is elongated with two of the toes much longer than the other two. The tail is exceptionally strong, muscled and long. It is used by the animal as a third leg, a prop when sitting and a balance when leaping.
Females have a forward opening pouch with four teats.
Births are usually single, but occasionally twins and immediately after birthing, the female mates again. The embryo that results from this mating is held in 'embryonic diapause' or delayed birth. When the pouched young is weaned or dies, that embryo resumes growth, is 'born' and enters the pouch. This dentition is suitable for grazing and browsing diets. Their normal body temperature is 96-99 degrees F. Babies can be a degree or two higher.