King Penguins in Moonlight

Photograph by Stefano Unterthiner

As sure as moonrise over Possession Island, king penguins gather each year for "ecstatic display." Puffing their chests, lifting their heads, and belting out calls, birds of both sexes advertise themselves. Before long, pairs form and join a crowd, and breeding season is on.

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