All birds are warm-blooded, have wings, a beak, feathers, and a backbone. There are, however, over 9,000 species of birds in the world so all birds are not the same. What is a Bird? describes in a clear, simple way:
• a bird's body
• facts about beaks, feet, and feathers
• how birds fly and why some can't
• where different birds live and what they eat
• eggs and chicks
• bird songs