The crescent nail-tail wallaby (Onychogalea lunata) was a nail-tail wallaby that lived in the woodlands and scrubs of the west and centre of Australia. It had silky fur and, like other nail-tail wallabies, had a horny spur at the tip of its tail. It was the size of a hare and was the smallest nail-tail wallaby at about 15 inches tall. When it was chased, it tended to seek refuge in a hollow tree. It entered at the bottom, clambered up and appeared at an opening high above. While running, the species held its forelimbs awkwardly and moved them in a rotary motion.