King Penguins Swimming

Photograph by Stefano Unterthiner

In September 2009, Photo of the Day featured images from National Geographic magazine.

A feeding party streams back to shore after several days at sea. Their orange markings, long, slender bills, and hefty, three-foot-long bodies distinguish them as king penguins. With bellies full of small fish, they will regurgitate a portion for waiting chicks.

See more photographs from the September 2009 National Geographic feature story "Every Bird a King."