A black-footed penguin (Spheniscus demersus) in waves 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.