Ole Jorgen Liodden / Beisa oryx (Oryx beisa) fighting in rut. Samburu, Kenya, December.

Richard Du Toit / Gemsbok (Oryx gazella) running, Namib-Naukluft National Park, Namibia

Jim Brandenburg / Gemsbok (Oryx gazella) on sand dune, Namib Desert, Namibia

Jim Brandenburg / Gemsbok (Oryx gazella) running across sand dune, Namib Desert, Namibia

Jim Brandenburg / Gemsbok (Oryx gazella) on sand dune, Namib Desert, Namibia

Jim Brandenburg / Gemsbok (Oryx gazella) standing on dune, Namib Desert, Namibia

Jim Brandenburg / Gemsbok (Oryx gazella) trio running on sand dune, Namib Desert, Namibia

Jim Brandenburg / Gemsbok (Oryx gazella) walking across sand dune, Namib Desert, Namibia

Winfried Wisniewski / Beisa Gemsbok (Oryx gazella beisa) mother nursing calf, Samburu-Isiolo Game Reserve, Kenya

Winfried Wisniewski / Beisa Gemsbok (Oryx gazella beisa) calf resting, Samburu-Isiolo Game Reserve, Kenya

Tui De Roy / East African Oryx (Oryx beisa), Borana Ranch, Kenya

Mary McDonald / Beisa Oryx (Oryx beisa) males fighting. Masai Mara Game Reserve, Kenya, East Africa.