The brush-tailed rock-wallaby or small-eared rock-wallaby ("Petrogale penicillata") is a kind of wallaby. It is one of several rock-wallabies in the genus "Petrogale". It lives in the rocks and cliffs of the Australia's Great Dividing Range from about north-west of Brisbane to the Grampians in south west Victoria. Its habitats include rainforest and dry sclerophyl forests. Numbers of brush-tailed rock-wallabies have gone down in the south and west of its range. It remains locally common in northern New South Wales and southern Queensland. In Victoria the species is nearly extinct with only four in the Grampians National Park, and 20 in East Gippsland. In 1988 at Jenolan caves in New South Wales, about 80 wallabies were released into the forest, but by 1992 there were only seven left.