He have a long beak, in some species is well pointed. As they feed on fish, squid, crustaceans, krill (the Antarctic shrimp) and other marine animals, the peak shape helps them catch prey. It also serves as defense. If you see a penguin in difficulty, be very careful if required to approach him for help. Some species, even those that appear to be completely harmless, we can start a strip of skin from a sting. The fins are also dangerous, the Emperor penguin can gives flight from one leg to a man, and there have been cases, have the legs in the back of the body and the earth can walk and even run faster than us. So upright walking, sometimes stagger when walking. At least one species, giving ground moves little jump. Also slide on the snow as slides.As in most birds in each leg has four fingers. Three fingers are front and one is later. The rear toe is small and kept separate. The three forwards are long, thick and are joined by a webbing.