title: Neglected developmental variables in the study of species identification in birds.
mesh_terms: D000819:Animal Communication; D000818:Animals; D000829:Animals, Domestic; D000831:Animals, Newborn; D001307:Auditory Perception; D001717:Birds / Q000254:growth & development*; D004192:Discrimination, Psychological; D004372:Ducks; D007173:Imprinting, Psychological; D008425:Maternal Behavior; D013045:Species Specificity; D014796:Visual Perception