First year Adelie penguin (Pygoscelis adeliae) chicks at breeding colony at Brown Bluff, Antarctica, Polar Regions

Bluetit bird feeding hungry young nestling in a garden bird box, The Cotswolds, Oxfordshire, England, United Kingdom

Bluetit bird feeding hungry young nestling in a garden bird box, The Cotswolds, Oxfordshire, England, United Kingdom

Hoopoe (Upupa epops) feeding young bird, Middle Elbe Biosphere Reserve, Saxony-Anhalt, Germany, Europe

Western osprey (Pandion haliaetus) with two young birds on eyrie, Kainuu, Finland, Europe

Western osprey (Pandion haliaetus) covering two young birds on eyrie, Kainuu, Finland, Europe

Middle spotted woodpecker (Dendrocopos medius) at nest hole, feeding young bird, Lower Saxony, Germany, Europe

Grey wagtail (Motacilla cinerea) feeding young bird, Hesse, Germany, Europe

Hoopoe (Upupa epops), adult feeding nestling at the entrance of the nest cavity with the larva of a snake, St. Margarethen, Tyrol, Austria, Europe

Close up of little yellow ducklings in a white wicker basket. Small boy in a white t-shirt is holding a pottle with cute pet nestlings. Child and birds. Summer background. Copy space

Little boy and little yellow ducklings swimming in washtub in the garden. Small boy in a white t-shirt with cute pets. Child and birds. Summer background. Copy space

Two adult Emperor penguins and a baby chick nestling between them, Weddell Sea, Snow Hill Island, Antarctica