Andrew Peacock / Common Hartebeest (Alcelaphus buselaphus) herd at sunrise, Ol Pejeta Conservancy, Kenya

Graeme Guy/ BIA / Coke's Hartebeest (Alcelaphus buselaphus cokii), Masai Mara, Kenya

Richard Du Toit / Common Hartebeest (Alcelaphus buselaphus) calves playing, Rietvlei Nature Reserve, South Africa

Richard Du Toit / Common Hartebeest (Alcelaphus buselaphus) running, Rietvlei Nature Reserve, South Africa

Richard Du Toit / Common Hartebeest (Alcelaphus buselaphus) in Pompom Weed (Campuloclinium macrocephalum), Rietvlei Nature Reserve, South Africa

Winfried Wisniewski / Coke's Hartebeest (Alcelaphus buselaphus cokii) male, Kenya

Winfried Wisniewski / Coke's Hartebeest (Alcelaphus buselaphus cokii) male on termite mount, Kenya

Winfried Wisniewski / Coke's Hartebeest (Alcelaphus buselaphus cokii) male flapping ears, Kenya

Richard Du Toit / Common Hartebeest (Alcelaphus buselaphus) males play fighting, Kgalagadi Transfrontier Park, South Africa

D. Parer & E. Parer-Cook / Coke's Hartebeest (Alcelaphus buselaphus cokii), Ngorongoro Conservation Area, Tanzania

Richard Du Toit / Common Hartebeest (Alcelaphus buselaphus) female walking with calf, Rietvlei Nature Reserve, Gauteng, South Africa

Tui De Roy / Common Hartebeest (Alcelaphus buselaphus), Ol Pejeta Conservancy, Kenya

Tui De Roy / Common Hartebeest (Alcelaphus buselaphus) profile, Mount Kenya Wildlife Conservancy, Nanyuki, Kenya

Suzi Eszterhas / Coke's Hartebeest (Alcelaphus buselaphus cokii) baby, Masai Mara, Kenya

Suzi Eszterhas / Coke's Hartebeest (Alcelaphus buselaphus cokii) baby nursing from mother, Masai Mara, Kenya

Suzi Eszterhas / Coke's Hartebeest (Alcelaphus buselaphus cokii) mother and baby, Masai Mara, Kenya

Suzi Eszterhas / Coke's Hartebeest (Alcelaphus buselaphus cokii) baby, Masai Mara, Kenya

Suzi Eszterhas / Coke's Hartebeest (Alcelaphus buselaphus cokii) pair, Masai Mara, Kenya

Suzi Eszterhas / Coke's Hartebeest (Alcelaphus buselaphus cokii) baby, Masai Mara, Kenya

Andrew Peacock / Common Hartebeest (Alcelaphus buselaphus) herd at sunrise, Ol Pejeta Conservancy, Kenya

Andrew Peacock / Common Hartebeest (Alcelaphus buselaphus) herd at sunrise, Ol Pejeta Conservancy, Kenya

Yva Momatiuk & John Eastcott / Red Hartebeest (Alcelaphus caama) herd drinking at waterhole in dry season with Common Eland (Tragelaphus oryx) group approaching, Etosha National Park, Namibia

Yva Momatiuk & John Eastcott / Red Hartebeest (Alcelaphus caama) herd drinking at waterhole in dry season with Common Eland (Tragelaphus oryx) group approaching, Etosha National Park, Namibia

Richard Du Toit / Common Hartebeest (Alcelaphus buselaphus) scratching head on termite mound, Rietvlei Nature Reserve, South Africa

Richard Du Toit / Brown Hyena (Hyaena brunnea) carrying Common Hartebeest (Alcelaphus buselaphus) leg, Kgalagadi Transfrontier Park, South Africa

Richard Du Toit / Common Hartebeest (Alcelaphus buselaphus) running, Rietvlei Nature Reserve, Gauteng, South Africa