Nick Garbutt / Red fronted lemur (Eulemus / Lemur fulvus rufus} infant nestling on mother's thigh, Ranomafana National Park, Madagascar

Roger Powell / Barn Owl (Tyto alba) juveniles nestling in together at entrance to nest cavity, Northumberland, UK

Tui De Roy / Galapagos Giant Tortoise (Chelonoidis nigra) nestlings rescued by wardens which take them back to captive rearing facilities before they emerge, Isabella Island, Galapagos Islands, Ecuador

Hanne & Jens Eriksen / Snowy owl {Nyctea scandiaca} chick on heathland nest, Kolyma, Siberia

Richard Porter / Confiscated goshawk nestling illegally collected from wild.

Chris Packham / Little owl {Athene noctua} with prey for nestling, England, UK

Kevin J Keatley / Young Barn owl (Tyto alba) at nest in Oak. Barn Owl Trust, UK Devon. 200 yr old tree. Released under licence.

Kevin J Keatley / Young Barn owls (Tyto alba) at nest in Oak. Barn Owl Trust, UK Devon. 200 yr old tree. 2 months, released under licence.

John Cancalosi / Great horned owl (Bubo virginianus) adult with chick in nest Arizona, USA Sonoran Desert. Nest in Saguaro cactus

John Cancalosi / Great horned owl (Bubo virginianus), young in nest Arizona, USA Sonoran Desert. Nest in Saguaro cactus

Paul Hobson / Nightjar {Caprimulgus europaeus} adult feeding chick. Nottinghamshire, UK.

Colin Seddon / Blackbird (Turdus merula) nestling being hand fed C