Some penguins are evenly dark and light colored.
Some species have ornamental touches of bright color. The Chinstrap Penguin is the only species with a line under its beak, as though it held a cap on. The Galapagos Penguin has a colorful beak, but the King and Emperor Penguins are the only ones with orange-yellow markings on the head and shoulders. For the song in its entirety, go here .