Emperor penguins, the largest species, are unique in that they are the only penguins that breed during the harsh Antarctic winters.

BBC: Emperor penguins face extinction

In mid-December, the Antarctic summer, a colony of chinstrap and Gentoo penguins are in their rookeries, cawing and carrying pebbles for their stone nests as males and females take turns warming their large, speckled eggs.

FORBES: Go with the Floe