A black-footed penguin (Spheniscus demersus) on Boulders Beach, South Africa. Other names for this flightless marine bird include the African penguin and the jackass penguin (because of its braying donkey-like call). This penguin is found in breeding colonies on islands off Namibia and South Africa, and at a few places on the South African mainland. It spends much time at sea, feeding on fish, squid and crustaceans. It breeds and moults on land and can reach a length of 50 centimetres. The pink patches over the eyes are blood-rich sweat glands that help cool the bird.