Sven Zacek / Roe Deer (Capreolus capreolus) pronking away from the photographer. Virumaa, Estonia, Europe, February.

Andy Rouse / Impala (Aepyceros melampus) male jumping during rut. Masai Mara, Kenya, Africa.

Gabriel Rojo / Patagonian mara / cavy (Dolichotis patagonum) stotting. Valdes Peninsula, Chubut, Patagonia, Argentina.

Gabriel Rojo / Patagonian mara / cavy (Dolichotis patagonum) stotting. Valdes Peninsula, Chubut, Patagonia, Argentina.

Ammonite / Male Thomson's gazelle (Eudorcas thomsoni) facing off with and chasing another, stotting, footage taken at night using starlight camera technology, Masai Mara, Kenya.

Andy Rouse / Impala (Aepyceros melampus) males rutting. Masai Mara, Kenya, Africa.

Tony Heald / Black-faced Impala (Aepyceros melamis petersi) male jumping ("stotting" or "pronking") to demonstrate fitness to potential mates, competitors and predators. Devil's Thorn fl (Tribulus terrestris) in f...