A baseline survey of vertebrates in Mining License Area 140 (ML140) of Langer Heinrich Uranium (Pty) Ltd (LHU) was undertaken during March and April 2009 in order to inform planning of mining and ecological restoration. ML140 is located at the boundary of two climatic zones, and vertebrates move across the area following weather fluctuations across this boundary. Several vertebrate species have their eastern or western, or their northern or southern distribution boundaries in the vicinity of ML140, therefore explaining the high diversity of vertebrates found at Langer Heinrich.