King penguin (Aptenodytes patagonicus) adult and chick at breeding and nesting colony at Salisbury Plain, South Georgia, Polar Regions

Adelie penguin (Pygoscelis adeliae) adult feeding chick at breeding colony at Brown Bluff, Antarctica, Polar Regions

Sandwich Terns (Sterna sandivicensis), in their breeding colony in June, on Brownsea Island, a nature reserve in Poole Harbour, Dorset, England, United Kingdom, Europe

Adult arctic tern (Sterna paradisaea) male bringing female a fish, Spitsbergen Island in the Svalbard Archipelago, Norway

A mother polar bear (Ursus maritimus), with cub of the year feeding on a fin whale carcass in Holmabukta, Svalbard, Norway

Seagulls nesting on a rocky cliff in Staithes, North Yorkshire, England, United Kingdom

Adult whooper swan (Cygnus cygnus), pair on nest near Lake Myvatn, Iceland

Adult whooper swan (Cygnus cygnus), pair on nest near Lake Myvatn, Iceland

Gentoo penguin (Pygoscelis papua) adult with chicks at breeding colony on Booth Island, Antarctica, Southern Ocean, Polar Regions

Adult gentoo penguin (Pygoscelis papua), feeding chicks at Brown Bluff near the Antarctic Peninsula, Southern Ocean, Polar Regions

Adelie penguin (Pygoscelis adeliae) adult defending chick against a skua on Torgersen Island, Antarctica, Polar Regions

Female southern elephant seal (Mirounga leonina) with newborn pup on the beach in Stromness Bay, South Georgia Island

Adult female upland goose (Chloephaga picta) with goslings on Carcass Island in the Falkland Islands

Adult sea otter (Enhydra lutris kenyoni) mother and pup in Inian Pass, Southeastern Alaska, United States of America

Gentoo penguin (Pygoscelis papua) chicks covered with mud and guano on Cuverville Island, Antarctica, Southern Ocean, Polar Regions

King penguins (Aptenodytes patagonicus) in downy plumage (okum boys) on South Georgia Island, Polar Regions

Adult upland goose pair (Chloephaga picta) with goslings on Carcass Island in the Falkland Islands

Adelie penguin (Pygoscelis adeliae), with chicks at breeding colony at Brown Bluff, Antarctic Peninsula, Antarctica, Polar Regions

Gentoo penguin (Pygoscelis papua) chick chasing adult for food at Hannah Point on Livingston Island, Antarctica, Polar Regions

Adult gentoo penguin (Pygoscelis papua) feeding minutes-old newly hatched chick at Gold Harbor on South Georgia

Blue-footed Booby bird feeds juvenile on Galapagos Islands, Ecuador