Nick Upton / Captive reared juvenile White stork (Ciconia ciconia) in flight over the Knepp Estate soon after release, Sussex, UK, August 2019.

Nick Upton / Captive reared juvenile White stork (Ciconia ciconia) with a GPS tracker on its back in flight over the Knepp Estate soon after release, Sussex, UK, August 2019.

Cyril Ruoso / Inmates of the Cedar Creek Corrections Center raising endangered Oregon spotted frog (Rana pretiosa) Prisoners in this facility are raising endangered frogs for release in the wild, as part of the Sus...

Jabruson / Mozambican children with captive passerines including Red-throated Twinspot (Hypargos niveoguttatus). Birds are caught to eat whilst watching fields against crop raiding baboons. Pemba to Montepuez hi...

Jabruson / Mozambican children with captive Yellow Baboon (Papio cynocephalus) youngster, caught during troop crop raiding. Pemba to Montepuez highway, north-eastern Mozambique. No release available.

Steven Kazlowski / Polar bear (Ursus maritimus) underwater view swimming in a pool, Anchorage Zoo, Alaska, USA. No release available.

Jabruson / Mozambican children with captive Yellow Baboon youngster (Papio cynocephalus). Young animal caught during troop crop raiding. Pemba to Montepuez highway, north-eastern Mozambique, November 2011. Wildl...

Doc White / Girl in aquarium watching Beluga / White Whale (Delphinapterus leucas) in aquarium. Captive. Model released.

Katherine Feng / Giant Panda (Ailuropoda melanoleuca), Xiang Xiang the first captive raised panda to be released into the wild, in pre release enclosure eating bamboo, Wolong Nature Reserve, endangered, China

Pete Oxford / Lake Titicaca with local Indian in traditional reed boat and Giant Titicaca frog {Telmatobius culeus} in foreground, captive release, Bolivia

Doug Perrine / Two Bottlenose dolphins {Tursiops truncatus} leaping from water. Captive release.

Adrian Davies / Eurasian beaver {Castor fiber} - bred in captivity prior to release into wild, UK