A duck on a lake in a park, United Kingdom, Europe

Colorful male pheasant bird walking on grassy field with fallen leaves, United Kingdom, Europe

King penguins with brown feathered chicks, St. Andrews Bay, South Georgia, South Atlantic

Adult brown Skua (Catharacta antarctica), in flight near the Antarctic peninsula in the Southern Ocean, Antarctica, Polar Regions

Adult brown pelicans (Pelecanus occidentalis), on a small islet near Isla Salsipuedes, Baja California, Mexico, North America

Adult brown pelican (Pelecanus occidentalis), in flight, Isla Carmen, Baja California Sur, Mexico, North America

Brown booby (Sula leucogaster), in flight off small islet north of Isla San Marcos, Baja California Sur, Sea of Cortez, Mexico, North America

A snowy egret (Egretta thula), fishing in the shallows, San Jose del Cabo, Baja California Sur, Sea of Cortez, Mexico, North America

Female mallard and ducklings on the edge of Lusiai Lake at Paluse, Aukstaitija National Park, Lithuania, Europe

Adult brown pelicans (Pelecanus occidentalis), in formation in flight near Isla Tortuga, Baja California, Mexico, North America

King penguins with brown feathered chicks, St. Andrews Bay, South Georgia, South Atlantic

Brown feathered king penguin chick, St. Andrews Bay, South Georgia, South Atlantic

King penguins with brown feathered chicks, St. Andrews Bay, South Georgia, South Atlantic

King penguins with brown feathered chicks, St. Andrews Bay, South Georgia, South Atlantic

King penguins with brown feathered chicks, St. Andrews Bay, South Georgia, South Atlantic

Two brown feathered chickens with red combs pecking at the ground on a grassy field, Chicken (Gallus domesticus), Austria, Europe