Chapter 1. Origin and Evolution of Birds -- Chapter 2. Skeleton and Skeletal Muscles -- Chapter 3. Integument -- Chapter 4. Nervous System -- Chapter 5. Locating, Ingesting, and Digesting Food -- Chapter 6. Cardiovascular and Immune Systems -- Chapter 7. Respiration -- Chapter 8. Endocrine System -- Chapter 9. Urinary System, Salt Glands, and Osmoregulation -- Chapter 10. Energy Balance and Thermoregulation -- Chapter 11. Avian Locomotion: Flying, Running, Walking, Climbing, Swimming, and Diving -- Chapter 12. Sound and Vocal Production and Function -- Chapter 13. Migration -- Chapter 14. Navigation and Orientation -- Chapter 15. Mating Systems -- Chapter 16. Avian Reproduction: Timing, Anatomy, and Eggs -- Chapter 17. Avian Reproduction: Nests and Nest Sites -- Chapter 18. Avian Reproduction: Clutch Sizes, Incubation, and Hatching -- Chapter 19. Avian Reproduction: Post-hatching Parental Care and Blood Parasitism.