King penguin (Aptenodytes patagonicus) chicks (okum boys) at breeding colony at Gold Harbour, South Georgia, Polar Regions

A young Song Thrush in a woodland in Kirkoswold, Eden Valley, Cumbria, UK.

Adelie penguin chick (Pygoscelis adeliae) fledging its downy feathers for the adult feathers underneath on Devil Island, Antarctica.

Gentoo Penguin (Pygoscelis papua) chick fledging in snow flurries in Antarctica.

Tawny frogmouth (Podargus strigoides) with fledging young on branch, Hopkins Creek, New South Wales, Australia, Pacific

Gentoo Penguin chick (Pygoscelis papua) fledging on the beach in Antarctica.

Gentoo Penguin chick (Pygoscelis papua) fledging on the beach in Antarctica.

Adelie penguin (Pygoscelis adeliae) chick molting its downy feathers with adult plumage beneath on Devil Island near the Antarctic Peninsula.