Printouts Penguins are birds that cannot fly , but they swim very well and spend most of their lives in the sea. There are 17 species of penguin.
Penguins have shiny, waterproof feathers that help keep their skin dry.
They have more feathers than most other birds - about 70 feathers per square inch. Each year, penguins molt, losing their old feathers and growing new ones. The Emperor Penguin is the largest penguin. Males and females look very similar. They have webbed feet which they use for swimming.