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Are penguins birds or mammals?

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Birds lay eggs and are not mammals. When penguins mate, the male watches the eggs while the female gathers the food. With the notable exception of the Galapagos Islands, penguins live in cold areas in the Southern Hemisphere. read more

Penguins are often mistaken for mammals or amphibians because they spend a good amount of their lives either on land or swimming in the waters to catch fish. But they are just birds that are unable to fly. read more

Penguins are a family of flightless, aquatic birds. Distinguished by their typical black and white color scheme, a type of camouflage called "countershading," penguins spend as much as three-fourths of their lives in the ocean hunting for fish, krill and squid. read more

The five most well known classes of vertebrates (animals with backbones) are mammals, birds, fish, reptiles, amphibians. Penguins are birds, even though they spend time on land and in water. Their motion in the water more closely resembles flying than the swimming motion used by other animals. Like other birds, penguins have feathers. Penguin feathers are short, dense, and packed so tightly together that they often look like smooth skin. read more

In common with other birds, penguins have feathers, lay eggs, and arewarm-blooded. Through evolutionary processes, penguins’ wings gradually adapted to become flippers, which they use for swimming. The feathers of a penguin are relatively short and stiff in comparison to those of other birds and they overlap closely to form a thick, smooth layer which traps air beneath it and so provides insulation from the cold. read more

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