On 10 April 2013 at 11h00 (ambient temperature 22°C), I observed an adult Psammophis namibensis (about 100 cm total length) attack an adult desert lizard Meroles knoxii. This observation was made approximately 50 km north of Oranjemund (28°06'29.2"S, 16°10'45.6"E, [2816AA], 320 m) in the Sperrgebied National Park, Namibia during a vertebrate fauna survey prior to proposed mining exploration activities. The substrate was a sand/gravel combination and the area was dominated by the following shrubs: Brownanthus arenosus, Euphorbia gummifera, Lycium tetrandrum and Salsola nollothensis.