Nabarleks (Petrogale concinna), are a tiny species of macropod found in northern Australia. They are a shy and nocturnal animal that resides in rocky hollows and forages in the surrounding area. Their diet is grasses, sedges, and ferns found in and around their scrub covered refuges. They are distinguished by a reddish tinge to the mostly grey fur and a distinct stripe at the cheek. They move with great speed and agility when observed, with a forward leaning posture and a bushy tail that arches over the back. Etymology The name comes from the Kunwinjku language of West Arnhem Land. The animal has also lent its name to the well known rock group from the area, Nabarlek. Taxonomy John Gould presented a description of this species to the Zoological Society of London in 1842, which was published in its Proceedings and introduced by the presiding chair William Yarrell as "two new species of Kangaroo". The affinities of the species have been recognised in several ways, including an arrangement that sees it placed with the brachyotis species group'. Other authors had separated this species to a new genus Peradorcas, producing a new combination Peradorcas concinna, although the revision by D. J. Kitchener of Petrogale did not recognise this treatment and this is maintained by other authorities. The locality of the type specimen is Wyndham, Western Australia. The specimen was collected and brought to England on the voyage of . Nabarlek is most closely related to the monjon and to the short-eared rock-wallaby Petrogale brachyotis. It was formerly considered distinct enough to be assigned its own genus, Peradorcas but it is now considered to belong, like the rest of the rock-wallabies, in the genus Petrogale. The common name designated for a similar species, monjon for P. burbidgei, is also used to refer this species in the Kimberley region; the two species are however known to be distinct by the indigenous people from whose language the name derives. Common names for the species include the little rock-wallaby or pygmy rock-wallaby. Subspecies Three subspecies have been recognised: P. concinna concinna Gould, 1842 The nominate subspecies, found at the Top End, follows Gould's original description. P. concinna canescens Thomas, 1909 The Arnhem Land population. The description for this subspecies was published by Oldfield Thomas after examination of new specimens that confirmed morphological distinctions in different localities. The type specimen, already held at the British Museum,