Slim Goodbody's Inside Guide to Pets: Birds

Maybe people keep birds as pets because they can do what humans can only dream about — fly. Explore how their special bones, air sacs, muscles, and feathers make this feat possible. In addition, discover why these winged creatures have two stomachs and how they can sleep without falling off branches in Birds.

• Detailed descriptions of how bones, muscles, organs, and other pet body systems work
• Cutaways, diagrams, and illustrations "look inside" animals' bodies
• Comparisons of pets' bodies to human bodies