Heather Angel / Northern white cheeked gibbon (Nomascus leucogenys) female standing in tree with baby aged two weeks. Parents captive bred and released. Wild Elephant Valley / Xishuangbanna, Yunnan Province, China, 2...

Heather Angel / Giant panda (Ailuropoda melanoleuca) portrait, in falling snow. Captive bred, in enclosure, Panda Breeding Centre, Wolong, Sichuan Province, China. February 2008.

Ernie Janes,Ernie Janes / Newly hatched ducklings with eggs.

Kristel Richard / A herd of Retuerta mares trotting, Guadiamar scientific reserve, Donana National Park, Andalusia, Spain. This breed of horse was close to extinction in the 1990s with only 5 individuals left, but now...

Roland Seitre / Mauricio dos Santos with a captive bred Spix's macaw (Cyanopsitta spixii), critically endangered species, site of the first attempts to breed Spix's macaw after their extinction in the wild, Recife, P...

Andy Rouse / Osprey (Pandion haliaetus) young male 'Einion' in flight. The bird is wearing a radio tracker. Dyfi Estuary, Wales, August. It is the first time ospreys have bred at this location for 400 years.

Andy Rouse / Osprey (Pandion haliaetus) newly fledged young on perch. Dyfi Estuary, Wales, August. It is the first time ospreys have bred at this location for 400 years.

Andy Rouse / Osprey (Pandion haliaetus) youngster landing in grass. Dyfi Estuary, Wales, August. It is the first time ospreys have bred at this location for 400 years.

David Woodfall / Collection of European eels (Anguilla anguilla) bred as part of breeding project, to be exported to Lough Neagh in Northern Ireland. UK. May 2010

Mitsuaki Iwago / Giant Panda (Ailuropoda melanoleuca), three captive bred cubs, China

Mitsuaki Iwago / Giant Panda (Ailuropoda melanoleuca) portrait, captive bred, Wolong, Sichuan, China

Mitsuaki Iwago / Giant Panda (Ailuropoda melanoleuca), captive bred cub, China