Penguins' bodies are designed to make them excellent swimmers and allow them to "fly" underwater. Their wings are shaped like paddles, their feet are webbed, and their bones are solid.
Penguins' feathers are shiny and waterproof. Their black and white coloring (known as "countershading") acts as camouflage underwater, protecting them against enemies such as sharks, leopard seals and killer whales.
Each year, penguins molt (change feathers) by dropping their old feathers and growing new ones.
