Some aspects of embryonic behaviour in the duck (Anas platyrhynchos).
D000818:Animals; D001522:Behavior, Animal; D002642:Chick Embryo; D010856:Columbidae; D004372:Ducks / Q000196:embryology*; D006257:Head; D007866:Leg; D008722:Methods; D009055:Mouth; D009068:Movement; D009333:Neck