David Woodfall / European Beaver (Castor fiber) eating blackberries by standing on its hind legs and using its tail as additional support. Part of captive breeding population prior to release into the Welsh landscape...

Will Watson / Young Lion (Panthera leo) drinking from a stream. African Lion Rehabiliation and Release into the Wild Programme,Victoria Falls, Zimbabwe. Controlled conditions.

Paul Williams / Timber rattlesnake (Crotalus horridus) with babies aged two days. Rhode Island, USA. Photographed as part of a captive breeding and release programme, Roger Williams Park Zoo.

Paul Williams / Timber rattlesnake (Crotalus horridus) female close up of scales, Rhode Island, USA. Part of captive breeding and release programme, Roger Williams Park Zoo.

Paul Williams / Timber rattlesnake (Crotalus horridus) with babies aged two days, part of a captive breeding and release programme, Roger Williams Park Zoo.

Paul Williams / Timber rattlesnake (Crotalus horridus) with babies aged two days, part of a captive breeding and release programme, Roger Williams Park Zoo.

Paul Williams / Timber rattlesnake (Crotalus horridus) with babies aged two days, part of a captive breeding and release programme, Roger Williams Park Zoo.

Paul Williams / Timber rattlesnake (Crotalus horridus) with babies aged two days, part of a captive breeding and release programme, Roger Williams Park Zoo.

Linda Pitkin / 2020VISION / Environment Agency staff Richard Redsull using electrofishing equipment to catch and then release Atlantic salmon (Salmo salar) in connection with a breeding programme, River Itchen, Hamphire, England...

Linda Pitkin / 2020VISION / Environment Agency staff David Hunter and Richard Redsull preparing electrofishing equipment to catch and then release Atlantic salmon (Salmo salar) in connection with a breeding programme, River Itch...

Linda Pitkin / 2020VISION / Female Atlantic salmon (Salmo salar) showing breeding colours in the River Itchen, where she has recently spawned after capture and release by the Environment Agency in connection with a breeding prog...

Linda Pitkin / 2020VISION / Female Atlantic salmon (Salmo salar) showing breeding colours in the River Itchen, where she has recently spawned after capture and release by the Environment Agency in connection with a breeding prog...

Linda Pitkin / 2020VISION / Female Atlantic salmon (Salmo salar) showing breeding colours in the River Itchen, where she has recently spawned after capture and release by the Environment Agency in connection with a breeding prog...

Linda Pitkin / 2020VISION / Female Atlantic salmon (Salmo salar) showing breeding colours in the River Itchen, where she has recently spawned after capture and release by the Environment Agency in connection with a breeding prog...

Linda Pitkin / 2020VISION / Female Atlantic salmon (Salmo salar) showing breeding colours in the River Itchen, where she has recently spawned after capture and release by the Environment Agency in connection with a breeding prog...

Linda Pitkin / 2020VISION / Female Atlantic salmon (Salmo salar) showing breeding colours in the River Itchen, where she has recently spawned after capture and release by the Environment Agency in connection with a breeding prog...

Linda Pitkin / 2020VISION / Female Atlantic salmon (Salmo salar) showing breeding colours in the River Itchen, where she has recently spawned after capture and release by the Environment Agency in connection with a breeding prog...

Ann & Steve Toon / Red kite (Milvus milvus) in pen perched in a line, awaiting release as part of reintroduction programme by the Forestry Commission, Grizedale, Cumbria, UK, August 2011. Captive.

Juan Manuel Borrero / Side-necked Terrapin (Podocnemis unifilis) hatchlings being collected, in preparation for their release. Pacaya Samiria National Reserve. Amazon Basin. Loreto. Peru October 2009

Doug Perrine / Australian flatback sea turtle hatchlings (Natator depressus) from captive release programme, emerging from nest and crawling down beach to the sea, Crab Island, Torres Strait, Queensland, Australia

Doug Perrine / Australian flatback sea turtle hatchlings (Natator depressus) from captive release programme, crawling down beach from nest, Crab Island, Torres Strait, Queensland, Australia

Doug Perrine / Tracks of Australian flatback sea turtle hatchling(Natator depressus) from captive release programme, as it crawls down nesting beach to the sea, Crab Island, Torres Strait, Queensland, Australia

Doug Perrine / Australian flatback sea turtle hatchling (Natator depressus) from captive release programme, crawling down beach from nest, Crab Island, Torres Strait, Queensland, Australia

Doug Perrine / Australian flatback sea turtle hatchling (Natator depressus) from captive release programme, crawling down beach from nest, Crab Island, Torres Strait, Queensland, Australia

Doug Perrine / Australian flatback sea turtle hatchlings (Natator depressus) from captive release programme, reach the sea after crawling down beach from nest, Crab Island, Torres Strait, Queensland, Australia

Doug Perrine / Australian flatback sea turtle hatchling (Natator depressus) from captive release programme, crawling down nesting beach to the sea, Crab Island, Torres Strait, Queensland, Australia

Doug Perrine / Australian flatback sea turtle hatchlings (Natator depressus) from captive release programme, reach the sea after crawling down beach from nest, Crab Island, Torres Strait, Queensland, Australia

Doug Perrine / Australian flatback sea turtle hatchlings (Natator depressus) from captive release programme, crawling down nesting beach to ocean, Crab Island, Torres Strait, Queensland, Australia

Doug Perrine / Australian flatback sea turtle hatchling (Natator depressus) from captive release programme, emerging from nest in sand, Crab Island, Torres Strait, Queensland, Australia

Doug Perrine / Australian flatback sea turtle hatchlings (Natator depressus) from captive release programme, reach the sea after crawling down beach from nest, Crab Island, Torres Strait, Queensland, Australia

Doug Perrine / Australian flatback sea turtle hatchlings (Natator depressus) from captive release programme, crawling down beach from nest, Crab Island, Torres Strait, Queensland, Australia

Doug Perrine / Group of Australian flatback sea turtle hatchlings (Natator depressus) from captive release programme, crawling down beach from nest to reach the sea, Crab Island, Torres Strait, Queensland, Austral...

Doug Perrine / Australian flatback sea turtle hatchlings (Natator depressus) from captive release programme, reaches the sea after crawling down beach from nest, Crab Island, Torres Strait, Queensland, Australia

Doug Perrine / Australian flatback sea turtle (Natator depressus) hatchling swimming past coral reef out to sea from nesting beach, Torres Strait, Queensland, Australia, captive release programme

Doug Perrine / Australian flatback sea turtle hatchling (Natator depressus) rises for a breath of air while swimming across shallow reef out to sea from nesting beach, Torres Strait, Queensland, Australia, captive r...

Doug Perrine / Australian flatback sea turtle (Natator depressus) hatchling swimming out to sea from nesting beach, Torres Strait, Queensland, Australia, captive release programme

Doug Perrine / Australian flatback sea turtle (Natator depressus) hatchling swimming out to sea from nesting beach, Torres Strait, Queensland, Australia, captive release programme

Doug Perrine / Australian flatback sea turtle (Natator depressus) hatchling swimming out to sea from nesting beach, Torres Strait, Queensland, Australia, captive release programme

Doug Perrine / Australian flatback sea turtle (Natator depressus) hatchling swimming out to sea from nesting beach, Torres Strait, Queensland, Australia, captive release programme

Shattil & Rozinski / Black-footed ferrets {Mustela nigripes} family group being prepared for release. Captive breeding programme, Colorado, USA

Shane Gross / Shark biologist Ian Bouyoucos and education programme assistant Cameron Raguse from the Cape Eluthera Institute release two juvenile lemon sharks (Negaprion brevirostris) back into the wild. The shark...