This species is endemic to northern Australia, where it is found in the tropical parts of the Gulf of Carpentaria, Queensland (H. Parnaby pers. comm.), Northern Territory, and Kimberley and along the coast of Western Australia. It is also present on offshore islands of the Melville, Bonaparte Archipelago, Groote Eylandt, and the Sir Edward Pellew Group (McKenzie and Churchill 2008). There is at least one recent record from the tip of the Cape York Peninsula in Queensland, so it may be more widely distributed (T. Reardon pers. comm.), but the taxonomy of this species requires clarification (H. Parnaby pers. comm.).