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

Chase Dekker / Lesser Flamingo (Phoenicopterus minor) wading, Amboseli National Park, Kenya

Chase Dekker / Lesser Flamingo (Phoenicopterus minor) pair fighting, Amboseli National Park, Kenya

Juergen & Christine Sohns / African Wild Dog (Lycaon pictus) group attacking Cape Warthog (Phacochoerus aethiopicus), Tswalu Game Reserve, South Africa

Gary Bell/ Oceanwide / Australian Giant Cuttlefish (Sepia apama) group gathered for mating, Whyalla, South Australia, Australia

Oscar Dewhurst / Fallow deer (Dama dama) walking across frost-covered playing fields at dawn, with tower blocks of London in the background. Richmond Park, London, UK. December

Suzi Eszterhas / African Elephant (Loxodonta africana) herd drinking at waterhole, Mashatu Game Reserve, Botswana

Suzi Eszterhas / African Elephant (Loxodonta africana) herd drinking at waterhole, Mashatu Game Reserve, Botswana

Cyril Ruoso / Przewalski's Horse (Equus ferus przewalskii) herd, Gobi Desert, Mongolia

Cyril Ruoso / Przewalski's Horse (Equus ferus przewalskii) herd, Gobi Desert, Mongolia

Jami Tarris / African Elephant (Loxodonta africana) herd on savanna, Mount Kilimanjaro, Amboseli National Park, Kenya

Daniel Heuclin / Vicuna (Vicugna vicugna), five running across salt flat with mountain in background. Salar de Ascotan, Chile. September 2018.