Letter: Sexing birds of prey.
D000818:Animals; D001717:Birds / Q000502:physiology*; D001947:Breeding; D005241:Feathers; D005260:Female; D007813:Laparotomy / Q000662:veterinary; D008297:Male; D010808:Physical Examination / Q000662:veterinary; D012727:Sex Characteristics; D014921:Wings, Animal