title: Prehatching and hatching behaviour in birds: a comparative study of altricial and precocial species.
mesh_terms: D000818:Animals; D000831:Animals, Newborn / Q000254:growth & development*; D005075:Biological Evolution; D001717:Birds / Q000196:embryology*; D002645:Chickens; D010856:Columbidae; D004372:Ducks; D005314:Embryonic and Fetal Development; D006801:Humans; D007185:Incubators; D009043:Motor Activity; D011784:Quail; D013045:Species Specificity; D013239:Stereotyped Behavior; D014422:Turkeys