• The monjon is the smallest species in its genus, with a body and head length of 300 to 350 millimeters and a weight of 950 to 1400 grams. The length of its hind foot is 80 to 92 mm.
• The wallaby is nocturnal and hides in crevices.
• It has a short tail with a tuft.

The monjon has short, dense fur that aids in camouflage among rocks; the species’ powerful hind legs allow for rapid jumps across cliffs; the tail is long and serves as a balancing aid during jumps; adult warabis possess these features.