Prenatal behavior of birds.
D000818:Animals; D001307:Auditory Perception; D005075:Biological Evolution; D001717:Birds / Q000196:embryology*; D002642:Chick Embryo; D003216:Conditioning, Operant; D004193:Discrimination Learning; D004372:Ducks; D005071:Evoked Potentials; D006309:Hearing; D012018:Reflex; D012683:Sensory Deprivation; D014110:Touch; D014722:Vestibule, Labyrinth / Q000196:embryology; D014785:Vision, Ocular; D014796:Visual Perception; D014828:Vocalization, Animal