There are about 10,000 different species of birds on the planet Earth. Birds have large eyes and they take up to 50 percent of their heads. Chickens are one of the most popular bird and they make about 200 different noises in order to communicate with other chickens. Some birds are kept as pets. Penguin is the only bird that can walk upright like humans. Owls are able to turn their head 360 but they don’t have the ability to move their eyes. Mockingbirds are very interesting as they are able to imitate many different sounds. Here are some Bird coloring pages.