Anatomy and Physiology

Digestion - Birds depend heavily on their digestive systems to remain nourished and healthy. Many birds can starve in hours if deprived of food, therefore, their digestive system is faster and more efficient than those of other vertebrate groups. >> more

Respiration - The avian respiratory system is different from that of other vertebrates, with birds having relatively small lungs plus air sacs that play an important role in respiration >> more

Skeleton - Birds have a lightweight skeleton made mostly of hollow bones. >> more

Topography - Feather locations of birds. >> more