Gentoo penguin (Pygoscelis papua) carries pebble in colony, Damoy Point, Wiencke Island, Antarctic Peninsula, Antarctica, Polar Regions

Chinstrap penguin (Pygoscelis antarctica) carrying pebble for nesting, Deception Island, Antarctica, Southern Ocean.

Gentoo penguins (Pygoscelis papua) in Antarctica

Rockhopper penguins (Eudyptes chrysocome) on the way to their colony, Pebble Island, Falkland Islands, Great Britain, South Atlantic, South America

A colony of Imperial shags, Leucocarbo atriceps. Pebble Island, Falkland Islands