What Is a Bird? (Science of Living Things) - USED CNF

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