What class of animals are penguins?

Penguins belong to the class of birds. But unlike most representatives of their class, penguins cannot fly, but move only on their paws. Penguins need wings for fast diving and moving in water in search of food. Penguins live near the South Pole of our planet. There are several types: royal, imperial. These birds have adapted to cold conditions: they have a fat layer, they have very thick plumage. Penguins live in colonies off the coast and on islands.