They have waterproof feathers
Penguins’ feathers are coated in a waterproof oil produced by an adaptive gland called the preen gland, shares Corbin Maxey, an animal expert and biologist. Penguin chicks, however, do not have waterproof feathers, which is why they stay out of the water. Penguins also have a higher feather density than most birds, more than 100 feathers per square inch, and at the base of each feather is a small muscle that holds the feather tightly to the body to trap warm air, explains Maxey. Don’t miss these facts and photos that prove penguins are the world’s most adorable animals.
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