Neil Aldridge / Black rhinoceros (Diceros bicornis) stands in evening light on Chief's Island in Okavango Delta, Botswana,. This rhino was released in the Okavango Delta as part of efforts to rebuild the rhino popula...

Neil Aldridge / Warthog (Phacochoerus africanus) with a Yellow-billed oxpecker (Buphagus africanus) on its back, nuzzling its mother at a waterhole, Chief's Island, Okavango Delta, Botswana.

Neil Aldridge / Leopard (Panthera pardus) male in vegetation, Chief's Island, Okavango Delta, Botswana. Vulnerable species.

Neil Aldridge / Portrait of a female Leopard (Panthera pardus) on Chief's Island, Okavango Delta, Botswana. Vulnerable species.

Neil Aldridge / Leopard (Panthera pardus) female resting on the branch of a tree in the heart of Chief's Island, Okavango Delta, Botswana. Vulnerable species. The leopard is classified as vulnerable by the IUCN and i...

Neil Aldridge / Leopard (Panthera pardus) cub peering out from thick vegetation in the heart of Chief's Island, Okavango Delta. Botswana

Pete Oxford / Konyak Naga tattooed Ang or Chief. Only someone who has killed and taken a human head can be tattooed in this manner. Mon district. Nagaland, North East India, October 2014.

Pete Oxford / Konyak Naga tattooed Ang or Chief. Only someone who has killed and taken a human head can be tattooed in this manner. Mon district. Nagaland, North East India, October 2014.

Laurent Geslin / Fulani village chief wearing traditional hat, with his two wives behind, Mauritania, West Africa, 2005

Laurent Geslin / Old chief of the Fulani community with his grandchild, South Mauritania, West Africa, 2005

Cheryl-Samantha Owen / Tribal elder and chief of his village, Orma village, pastoralist tribe living in Tana River delta, Kenya, East Africa 2010. No release available.

Charlie Summers / American Pika (Ochotona princeps) leaping from one alpine rock to another as it heads to its home carrying food for the winter months. Rocky Mountain National Park, Colorado, USA. August.