Sean Crane / Kob (Kobus kob) male, Queen Elizabeth National Park, Uganda

Adri de Visser / African Lion (Panthera leo) female looking at Kob (Kobus kob) calf, Queen Elizabeth National Park, Uganda

Sean Crane / Lechwe (Kobus leche) running through water, Okavango Delta, Botswana

Theo Allofs / Lechwe (Kobus leche) and Cattle Egret (Bubulcus ibis) in Moremi Game Reserve, Okavango Delta, Botswana

Yva Momatiuk & John Eastcott / Waterbuck (Kobus ellipsiprymnus) male with engorged pre-orbital scent-glands below eyes, Masai Mara National Reserve, Kenya

Yva Momatiuk & John Eastcott / Topi (Damaliscus lunatus), Masai Mara National Reserve, Kenya

Richard Du Toit / Waterbuck (Kobus ellipsiprymnus) males in Pompom Weed (Campuloclinium macrocephalum) field, Rietvlei Nature Reserve, South Africa

Richard Du Toit / Waterbuck (Kobus ellipsiprymnus) male in Pompom Weed (Campuloclinium macrocephalum) field, Rietvlei Nature Reserve, South Africa

Yva Momatiuk & John Eastcott / Waterbuck (Kobus ellipsiprymnus) sub-adults, Mokala National Park, South Africa

Anup Shah / Defassa Waterbuck (Kobus ellipsiprymnus defassa) females and male, Masai Mara, Kenya

Adri de Visser / African Lion (Panthera leo) female predating Ugandan Kob (Kobus kob thomasi) calf, Queen Elizabeth National Park, Uganda

Richard Du Toit / Waterbuck (Kobus ellipsiprymnus) rams, Rietvlei Nature Reserve, South Africa

Hiroya Minakuchi / Waterbuck (Kobus ellipsiprymnus) male, Okavango Delta, Botswana

Sebastian Kennerknecht / Kob (Kobus kob) male, Toro-Semliki Wildlife Reserve, Western Rift Valley, Great Rift Valley, western Uganda

Adri de Visser / African Lion (Panthera leo) female pawing Kob (Kobus kob) calf, Queen Elizabeth National Park, Uganda

Pete Oxford / Waterbuck (Kobus ellipsiprymnus) skull, Zimbabwe

Adri de Visser / African Lion (Panthera leo) female and Kob (Kobus kob) calf, Queen Elizabeth National Park, Uganda

Richard Du Toit / Waterbuck (Kobus ellipsiprymnus) feeding, Kruger National Park, South Africa

Richard Du Toit / Waterbuck (Kobus ellipsiprymnus) herd crossing river, Kruger National Park, South Africa

Winfried Wisniewski / Puku (Kobus vardonii) male in steppe grass, South Lungwa National Park, Zambia

D. Parer & E. Parer-Cook / Waterbuck (Kobus ellipsiprymnus) female, Ol Pejeta Conservancy, Kenya

Martin Willis / Waterbuck (Kobus ellipsiprymnus) pair in rust-coloured grass of savanna, Kruger National Park, South Africa

Richard Du Toit / Waterbuck (Kobus ellipsiprymnus) sub-adult male, Kruger National Park, South Africa

Theo Allofs / Lechwe (Kobus leche) females running, Moremi Game Reserve, Okavango Delta, Botswana

Matthias Breiter / Waterbuck (Kobus ellipsiprymnus) mother and calf, Kruger National Park, South Africa

Pete Oxford / Waterbuck (Kobus ellipsiprymnus) male beside waterhole, Moremi Game Reserve, Okavango Delta, Botswana

Pete Oxford / Waterbuck (Kobus ellipsiprymnus) male running, Moremi Game Reserve, Okavango Delta, Botswana

Richard Du Toit / Waterbuck (Kobus ellipsiprymnus) female and young calf, Mapungubwe National Park, South Africa

Tui De Roy / Defassa Waterbuck (Kobus ellipsiprymnus defassa) male, Ol Pejeta Conservancy, Kenya

Sergey Gorshkov / Lechwe (Kobus leche) herd running through shallow water, Botswana

Sergey Gorshkov / Lechwe (Kobus leche) females running through shallow water, Botswana

Sergey Gorshkov / Lechwe (Kobus leche) female running through shallow water, Botswana

Sergey Gorshkov / Lechwe (Kobus leche) female running through shallow water, Botswana

Sergey Gorshkov / Lechwe (Kobus leche) herd running through shallow water, Botswana

Richard Du Toit / Waterbuck (Kobus ellipsiprymnus) females, Chobe National Park, Botswana

Richard Du Toit / Defassa Waterbuck (Kobus ellipsiprymnus defassa) herd, Masai Mara, Kenya

Richard Du Toit / Puku (Kobus vardonii) young rams, Chobe National Park, Botswana

ZSSD / Kob (Kobus kob) males sniffing each other, native to Africa

Vincent Grafhorst / Lechwe (Kobus leche) male biting its itchy back, Moremi Game Reserve, Okavango Delta, Botswana

Vincent Grafhorst / Lechwe (Kobus leche) male in the Khwai River floodplain, Moremi Game Reserve, Okavango Delta, Botswana

Vincent Grafhorst / Lechwe (Kobus leche) female on the Khwai River floodplain, looking back, Moremi Game Reserve, Okavango Delta, Botswana

Vincent Grafhorst / Lechwe (Kobus leche) females on the Khwai River floodplain, Moremi Game Reserve, Okavango Delta, Botswana

Vincent Grafhorst / Lechwe (Kobus leche) male, Moremi Game Reserve, Okavango Delta, Botswana

Tim Fitzharris / Defassa Waterbuck (Kobus ellipsiprymnus defassa), Kenya

Ingo Arndt / Defassa Waterbuck (Kobus ellipsiprymnus defassa) male portrait, Masai Mara National Reserve, Kenya

Suzi Eszterhas / Defassa Waterbuck (Kobus ellipsiprymnus defassa) on savanna landscape, Lewa Wildlife Conservancy, Kenya

Theo Allofs / Waterbuck (Kobus ellipsiprymnus) feeding in swamp, Moremi Game Reserve, Botswana

Suzi Eszterhas / Defassa Waterbuck (Kobus ellipsiprymnus defassa) running, Masai Mara, Kenya

Richard Du Toit / Lechwe (Kobus leche) aerial shot of a herd in summertime, Okavango Delta, Botswana

Richard Du Toit / Lechwe (Kobus leche) herd, Okavango Delta, Botswana

Patricio Robles Gil / Puku (Kobus vardonii) portrait, Moremi Game Reserve, Botswana

Patricio Robles Gil / Waterbuck (Kobus ellipsiprymnus) portrait, Kruger National Park, South Africa

Winfried Wisniewski / Waterbuck (Kobus ellipsiprymnus) male portrait, Africa

Yva Momatiuk & John Eastcott / Waterbuck (Kobus ellipsiprymnus) buck with large horns, Masai Mara National Reserve, Kenya

Yva Momatiuk & John Eastcott / Waterbuck (Kobus ellipsiprymnus) buck in lush wetlands, Masai Mara National Reserve, Kenya

Yva Momatiuk & John Eastcott / Waterbuck (Kobus ellipsiprymnus) female, resting in green grass, Lake Nakuru National Park, Kenya

Ingo Arndt / Kob (Kobus kob) adult male lying down

Ingo Arndt / Kob (Kobus kob) frontal view of adult male

Ingo Arndt / Kob (Kobus kob) two males fighting beside female

Suzi Eszterhas / Kob (Kobus kob) male running, Queen Elizabeth National Park, Uganda

Suzi Eszterhas / Kob (Kobus kob) mother with calf, Queen Elizabeth National Park, Uganda

Piotr Naskrecki / Waterbuck (Kobus ellipsiprymnus) trio at waterhole, Gorongosa National Park, Mozambique

Adri de Visser / African Lion (Panthera leo) female temporarily adopting Kob (Kobus kob) calf, Uganda

Cyril Ruoso / Lechwe (Kobus leche) herd in swamp, Bangweulu Wetlands, Zambia

Juergen & Christine Sohns / Waterbuck (Kobus ellipsiprymnus) female, Kruger National Park, South Africa

Richard Du Toit / Waterbuck (Kobus ellipsiprymnus), iSimangaliso Wetland Park, KwaZulu-Natal, South Africa

Anup Shah / Defassa Waterbuck (Kobus ellipsiprymnus defassa) mother and calf, Masai Mara, Kenya

Sebastian Kennerknecht / Lechwe (Kobus leche) herd in papyrus floodplain, Busanga Plains, Kafue National Park, Zambia

Sebastian Kennerknecht / Lechwe (Kobus leche) females in floodplain at dawn, Busanga Plains, Kafue National Park, Zambia

Sebastian Kennerknecht / Lechwe (Kobus leche) male in floodplain, Busanga Plains, Kafue National Park, Zambia

Sebastian Kennerknecht / Puku (Kobus vardonii) juvenile, Busanga Plains, Kafue National Park, Zambia

Sebastian Kennerknecht / Waterbuck (Kobus ellipsiprymnus) male in miombo woodland, Kafue National Park, Zambia

Sebastian Kennerknecht / Waterbuck (Kobus ellipsiprymnus) male, Kafue National Park, Zambia

Sebastian Kennerknecht / Puku (Kobus vardonii) sub-adult male in savanna, Kafue National Park, Zambia

Sebastian Kennerknecht / Puku (Kobus vardonii) male in savanna, Kafue National Park, Zambia

Sebastian Kennerknecht / Puku (Kobus vardonii) sub-adult males, Kafue National Park, Zambia

Sebastian Kennerknecht / Puku (Kobus vardonii) male walking, Kafue National Park, Zambia

Sebastian Kennerknecht / Cheetah (Acinonyx jubatus) three year old male brothers feeding on male Puku (Kobus vardonii) kill, Kafue National Park, Zambia

Adri de Visser / Lechwe (Kobus leche) male in herd, Lake Bangweulu, Zambia

Anup Shah / Defassa Waterbuck (Kobus ellipsiprymnus defassa) male in savanna, Masai Mara, Kenya

Richard Du Toit / Waterbuck (Kobus ellipsiprymnus) female, KwaZulu-Natal, South Africa

Sebastian Kennerknecht / Kob (Kobus kob) male and females, Toro-Semliki Wildlife Reserve, Western Rift Valley, Great Rift Valley, western Uganda

Anup Shah / Defassa Waterbuck (Kobus ellipsiprymnus defassa) males at sunrise, Masai Mara, Kenya

Richard Du Toit / Waterbuck (Kobus ellipsiprymnus) male jumping across river, Kruger National Park, South Africa

Winfried Wisniewski / Puku (Kobus vardonii) male, South Lungwa National Park, Zambia

Winfried Wisniewski / Puku (Kobus vardonii) male running, South Lungwa National Park, Zambia

Winfried Wisniewski / Puku (Kobus vardonii) male on banks of Luangwa River, South Lungwa National Park, Zambia

Richard Du Toit / Waterbuck (Kobus ellipsiprymnus) pair of males, Rietvlei Nature Reserve, South Africa

Matthias Breiter / Waterbuck (Kobus ellipsiprymnus) sub-adult males, Linyanti River, Botswana

Pete Oxford / Lechwe (Kobus leche) male wading, Moremi Game Reserve, Okavango Delta, Botswana

Pete Oxford / Lechwe (Kobus leche) male running through water, Moremi Game Reserve, Okavango Delta, Botswana

Sergey Gorshkov / Lechwe (Kobus leche) herd in shallow water on flood plain, Botswana

Sergey Gorshkov / Lechwe (Kobus leche) herd in shallow water on flood plain, Botswana

Theo Allofs / Lechwe (Kobus leche) feeding and Cattle Egret (Bubulcus ibis) in Moremi Game Reserve, Okavango Delta, Botswana