Are penguins really monogamous? | live sciences

There is something cute—maybe even romantic—about penguin courtship. After spending months at sea, looking for fish and swimming in the icy waters, female Adélie penguins (Pygoscelis adelia) skate in the same breeding grounds, year after year. Wandering through the bar scene of swarming males, they shrug off progress and make a bee streak for their mates from the previous season: the males who arrived before the females to arrange their nest.

Penguins like these are models of long-term commitment. But are all penguins bound to one partner for their entire lives?