The biology and evolution of bird songs.
D000818:Animals; D001522:Behavior, Animal; D005075:Biological Evolution; D001717:Birds / Q000502:physiology*; D005260:Female; D007002:Hypoglossal Nerve / Q000502:physiology; D007823:Laryngeal Nerves / Q000502:physiology; D007858:Learning; D008297:Male; D012726:Sexual Behavior, Animal; D014828:Vocalization, Animal