An Antarctic skua eats the remains of a penguin in Petermann Island, Antarctica, on March 2, 2016.
Like seals and whales, penguins eat krill, an inch-long shrimp-like crustacean that forms the basis of the Southern Ocean food chain. But penguin-watchers say the krill are getting scarcer in the western Antarctic peninsula, under threat from climate change and fishing. / AFP PHOTO / EITAN ABRAMOVICH
Foto: AFP - EITAN ABRAMOVICH