Penguins are very hardy animals that live in high latitudes. According to the class it belongs to, penguins are birds, so they are a kind of birds. From the appearance, they are indeed different from the birds we usually see, but we can not think that they are not birds. In fact, the existence of penguins is a very long history, is an ancient swimming birds, can also be said to be a typical seabird.
As birds, penguins share many key characteristics with other birds. For example, their bodies are covered with feathers. This is their special body structure, is used to keep warm, most birds have feathers on the surface of the body. For example, penguins belong to homeotherms, their body temperature is constant, homeothermy is also one of the common characteristics of birds. This has a lot to do with the way penguins keep warm, not only with their feathers, but also with a thick layer of fat under their skin, which is very good for keeping warm, so that they can keep their body temperature constant at more than 30 degrees. And the way they reproduce, penguins use oviparous reproduction, which is also a common feature of birds, through which penguins can be distinguished from mammals.
The above has been introduced, penguins are birds in the animal, is a kind of birds. The birds we usually see can fly in the sky, but penguins are different, they do not have the ability to fly. But we can't think that penguins are not birds because they belong to swimming birds and can't fly. Penguins have legs. They stand upright; They have webbing between their toes that allows them to move around on the ground. Although they can't fly, they can swim, and they can swim well, because their forelimbs are similar to the fins of fish. With the ability to swim, penguins can prey on many marine animals.
