Penguins are flightless sea birds. Its torpedo–shaped body allows the bird to travel swiftly in water. They use their short flat wings like flippers. Penguins are the only birds that can swim but cannot fly. There are 18 types of penguins. They live in Antarctica, Africa, New Zealand, Australia, and South America. Penguins have a thick layer of fat that helps to protect them from the cold. A penguin typically has a black back and a white belly. Short, glossy feathers cover its body are waterproof and helps keep the bird warm.
Penguins live in nesting colonies, that can be enormous. In large groups they are safer from predators, such as skuas, sharks, killer whales, and especially leopard seals.