Luke Massey / Spotted hyenas (Crocuta crocuta) in urban setting at night, Harar, Ethiopia

Neil Aldridge / Spotted hyaena (Crocuta crocuta) reassuring her tiny pup at the entrance to their den, Northern Tuli Game Reserve, Botswana.

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

Will Burrard-Lucas / Spotted hyena (Crocuta crocuta) low angle shot of group taken with remote camera. Liuwa Plain National Park, Zambia. May

Anup Shah / White-backed vultures (Gyps africanus) waiting for Spotted hyenas (Crocuta crocuta) to finish feeding on a kill. Maasai Mara National Reserve, Kenya.

Anup Shah / Spotted hyenas (Crocuta crocuta) approaching with curiosity. Masai Mara National Reserve, Kenya. Taken with remote wide angle camera.

Martin Dohrn / Three hyenas (Crocuta crocuta) approaching a resting lion (Panthera leo) at night. Topi Plain, Masai Mara, Kenya. Image taken using an infared camera with no artificial visible light, on location for...

Anup Shah / Female Spotted hyenas (Crocuta crocuta) walking through savanna, Masai Mara National Reserve, Kenya. March

Martin Dohrn / Spotted hyaenas {Crocuta crocuta} on the prowl. Serengeti NP, Tanzania, East Africa. Image taken using 'Starlight Camera' technology without artificial lighting. Ngorongoro Conservation Area,

Martin Dohrn / Spotted hyaenas harrass lioness. Serengeti NP, Tanzania, East Africa. Infra-red image taken at night using 'Starlight Camera' technology without artificial lighting. Ngorongoro Conservation Area,

Martin Dohrn / Spotted hyaena portrait in moonlight {Crocuta crocuta} Serengeti NP Tanzania, East Africa. Image taken using 'Starlight Camera' technology without artificial lighting. Ngorongoro Conservation Area,

Martin Dohrn / Spotted hyaenas {Crocuta crocuta} feeding on kill, Serengeti NP, Tanzania, East Africa. Image taken at night using 'Starlight Camera' technology without artificial lighting. Ngorongoro Conservation Ar...