Some glimpses of comparative avian physiology.
D000222:Adaptation, Physiological; D000273:Adipose Tissue / Q000378:metabolism; D000818:Animals; D001717:Birds / Q000502:physiology*; D002151:Calorimetry; D002940:Circadian Rhythm; D004063:Digestion; D004735:Energy Transfer; D006066:Gonads / Q000502:physiology; D010870:Pineal Gland / Q000502:physiology; D012119:Respiration; D013045:Species Specificity; D014882:Water-Electrolyte Balance