The main types of predators that eat penguins are marine animals, such as leopard seals, whales and sharks. Many land animals are also a threat to penguins in Antarctica and include birds like petrels, skuas and gulls.
These birds either steal penguin eggs or kill their chicks. Penguins, which live in other areas of the world like the Galapagos Islands, Australia and in South Africa, can have different land predators that include snakes, ferrets, lizards and foxes.
There are about 17 species of penguins. The largest species is the Emperor penguin, which can weigh between 60 and 90 pounds and be over 3 feet tall. Weighing about 2.2 pounds, the fairy penguin is the smallest. Penguins are flightless birds that eat mainly fish and krill that they hunt in the water.