The nail-tail wallabies, of genus Onychogalea, are three species of macropods, all found in Australia.

Related to kangaroos and wallabies, they are smaller species distinguished by a horny spur at the end of their tail.

[5] There are three recognised species of the genus Onychogalea, the nail-tailed wallabies, they are:[1] A genus of Macropodidae, small and herbivorous species with a shy disposition.

The earliest descriptions noted their elegant shape, graceful movements and beautiful markings.

[6] Named for one of their general characteristics, the nail-tailed wallaby has a horny point two or three millimetres wide at the tip of the tail, an almost unknown characteristic for a mammal that has been compared to the bony spur of a lion's tail.