Caption: Lion pair (Panthera leo) snarl, growl and grimace during final stages of mating, Mashatu Game Reserve, Tuli Block, Botswana. © Scotch Macaskill

Camera: Canon EOS 400D (Digital Rebel XTi); Lens: Canon 70-300 F4-5.6 IS USM; Focal Length: 100mm; Shutter speed: 1/1600; Aperture: f5.6; ISO: 400.