The yellow-footed rock-wallaby (Petrogale xanthopus), formerly known as the ring-tailed rock-wallaby, is a member of the macropod family (the marsupial family that includes the kangaroos, wallabies, tree-kangaroos, and wallaroos). Description The yellow-footed rock-wallaby is grey to fawn-grey above and light-coloured below with a black mid-dorsal stripe from the crown of the head to the centre of the back. There is a distinct white cheek stripe, with ears ranging in colour from orange to grey-brown. The forearms and hind legs are bright yellow to rich orange to a light orange-brown. The tail is orange-brown irregularly ringed with dark brown and golden-brown, with the colour of the tip variable from dark brown to white. The head and body length is 480–650 mm (usually 600 mm), with tail length 570–700 mm (usually 690 mm), and weight 6–11 kg. Distribution and habitat This species of rock-wallaby is found in western New South Wales, eastern South Australia and isolated portions of Queensland. It is not typically found near human habitation, instead preferring rough terrain and rock outcroppings. Subspecies There are two recognised subspecies. There are no observable differences between the two subspecies, but genetic analysis of DNA samples from the different populations found them to be genetically distinct. The genetic divergence between the subspecies is greater than that between some other rock-wallaby species, reinforcing the subspecies status. The two subspecies are: P. x. xanthopus P. x. xanthopus is listed as vulnerable under the Environment Protection and Biodiversity Conservation Act 1999 by the Australian government. Colonies persist in South Australia, within the Gawler Ranges, the Flinders Ranges and the Olary Ranges. The population is SA is estimated at around 2,000 to 6,500 animals, with great uncertainty and likely large fluctuations. Due to conservation efforts by sanctuaries in the Flinders Ranges and pastoralists in the Olary Ranges, populations there have increased in recent years. In NSW, colonies have been found at three sites in the Gap Range and seven sites in the Coturaundee Range, with a population of between 170 and 215 animals. Threats include competition from introduced herbivores (in particular feral goats and rabbits), predation by foxes and feral cats, isolation of populations, and habitat destruction through mineral exploration. P. x. celeris P. x. celeris is listed as vulnerable under the Environment Protection and Biodiversity Conservation Act 1999 by the Australian government. It has a restricted distribution in the rocky ranges of central-western Queensland. Threats include