Martin Dohrn / Group of lions (Panthera leo) at night, Masai Mara, Kenya. Photographed using 'Starlight Camera' technology without artificial lighting.

Andy Rouse / Cheetah (Acinonyx jubatus) running, Kenya (non-ex)

Andy Rouse / Cheetah (Acinonyx jubatus) running, Kenya (non-ex)

Anup Shah / Leopard resting with cub (Panthera pardus) Masai Mara NR, Kenya

Anup Shah / Leopard resting with cub (Panthera pardus) Masai Mara NR, Kenya

Klein & Hubert / Male Cheetah (Acinonyx jubatus) sitting in high grass in shade of acacia tree in savanna, Kenya, Africa.

Klein & Hubert / African lioness (Panthera leo) with her cub in savanna, Kenya, Africa.

Klein & Hubert / African elephant (Loxodonta africana) calf playing in savanna, Kenya, Africa.

Denis-Huot / Aerial view of African elephants (Loxodonta africana) drinking and landscape, Samburu Game Reserve, Kenya

Anup Shah / African elephant (Loxodonta africana) babies playing . Masai Mara National Reserve, Kenya. July 2017.

Anup Shah / Lion (Panthera leo) males walking together . Masai Mara National Reserve, Kenya.

Tui De Roy / Black rhino (Diceros bicornis) with very long horn, Lewa Wildlife Conservancy, Laikipia, Kenya. October.

Tui De Roy / Three White rhinoceroses (Ceratotherium simum), Solio Game Reserve, Laikipia, Kenya. September.

Denis-Huot / Blue wildebeest (Connochaetes taurinus), migrating herd silhouetted on the horizon at sunset, Masai Mara Game Reserve, Kenya

Wim van den Heever / Cheetah (Acinonyx jubatus) hunting Springbok (Antidorcas marsupialis) Kgalagadi, South Africa

Wim van den Heever / Tranquil landscape with African elephant (Loxodonta africana) and rays of sunlight at sunrise, Masai Mara, Kenya.

Will Burrard-Lucas / Lion (Panthera leo) walking over the plain, taken with remote camera. Serengeti National Park, Tanzania. December

Will Burrard-Lucas / Spotted hyena (Crocuta crocuta) at night, taken with remote camera. Liuwa Plain National Park, Zambia. December

Wim van den Heever / African elephant (Loxodonta africana) bull 'One Ton' with massive tusks at dusk, with another behind. Chyulu Hills, Kenya.

Anup Shah / Eastern White-bearded Wildebeest (Connochaetes taurinus) herd crossing the Mara River. Masai Mara National Reserve, Kenya.

Anup Shah / Eastern White-bearded Wildebeest (Connochaetes taurinus) herd crossing the Mara River. Masai Mara National Reserve, Kenya.

Denis-Huot / Masai giraffe (Giraffa camelopardalis tippelskirchi) two silhouetted at sunrise, Maasai Mara Game Reserve, Kenya.

Klein & Hubert / African elephant (Loxodonta africana) mother and calf walking through savanna, Botswana.

Wim van den Heever / Blue wildebeest (Connochaetes taurinus) herd during migration, Masai Mara, Kenya.

Cheryl-Samantha Owen / African lioness (Panthera leo) sitting patiently in the long grass, watching herd of Common eland (Tragelaphus oryx). Focus on lion. Grumeti Reserve, Northern Tanzania.

Cheryl-Samantha Owen / Common or plains zebra (Equus quagga burchelli) grazing in bushTarangire National Park, Northern Tanzania.

Denis-Huot / Masai giraffe (Giraffa cameleopardalis tippelskirchi) herd walking across savanna in dry season, Masai-Mara Game Reserve, Kenya

Klein & Hubert / Herd of African elephants (Loxodonta africana) walking, Kenya

Klein & Hubert / One Masai giraffe (Giraffa camelopardalis tippelskirchi) portrait with another in distance, while crossing a dry lake bed, Kenya

Klein & Hubert / Male Ostrich (Struthio camelus massaicus) running, Kenya.,

Klein & Hubert / Male Ostrich (Struthio camelus massaicus) running, Kenya.,

Klein & Hubert / Grants zebra (Equus quagga boehmi) foal running in savanna. Kenya.

Andy Rouse / African lion (Panthera leo) on plains, Masai Mara, Kenya.

Denis-Huot / African elephant (Loxodonta africana) standing in the rain, Masai-Mara Game Reserve, Kenya. March.

Denis-Huot / Masai giraffe (Giraffa camelopardalis tippelskirchi) in distance silhouetted at sunrise with clouds, Masai-Mara Game Reserve, Kenya. September.

Denis-Huot / Masai giraffes (Giraffa camelopardalis tippelskirchi) in dry season, Masai-Mara Game Reserve, Kenya. March.

Denis-Huot / Group of male African lions (Panthera leo) resting with storm clouds overhead, Masai-Mara Game Reserve, Kenya. September.

Denis-Huot / Aerial view of African elephants (Loxodonta africana) and African buffalo (Syncerus caffer) at a water hole during the dry season, Tsavo East National Park, Kenya. October.

Denis-Huot / Masai giraffe (Giraffa camelopardalis tippelskirchi) herd at sunrise, Masai-Mara Game Reserve, Kenya. November.

Denis-Huot / Cheetah (Acinonyx jubatus) female with cubs sitting in long grass during the dry season, Masai-Mara Game Reserve, Kenya. March.

Denis-Huot / Crowned crane (Balearica regulorum gibbericeps) pair at sunrise, Masai-Mara Game Reserve, Kenya. June.

Denis-Huot / African elephant (Loxodonta africana) herd at sunset, Masai-Mara Game Reserve, Kenya. January.

Denis-Huot / Masai giraffes (Giraffa camelopardalis tippelskirchi), at sunrise, Masai-Mara Game Reserve, Kenya. March.

Denis-Huot / Masai giraffes (Giraffa camelopardalis tippelskirchi), at sunrise, Masai-Mara Game Reserve, Kenya. March.

Denis-Huot / Cheetah (Acinonyx jubatus) resting with rainbow behind it, Masai-Mara Game Reserve, Kenya. September.

Denis-Huot / Male black rhinoceros (Diceros bicornis) silhouetted against clouds, Masai-Mara Game Reserve, Kenya. March.