Penguins.
Penguins are swimming birds that live in the earth’s southern hemisphere (the southern half of our planet). They have webbed feet and flipper-like wings, which they use to swim. Unlike other birds, penguins have feathers all the way down their legs. They also have a thick layer of fat under their skin. These help to keep them warm in the cold Antarctic. When it is to time breed, penguins gather together in large groups called colonies. They huddle together to keep each other warm.Penguins are clumsy on land but are graceful and fast in water. The surface of their bodies is smooth so that they slip through the water easily. They find it difficult to walk on and and often slide along the snow on their bellies.