Non-specificity of the following response in Peking ducklings.
D000818:Animals; D001143:Arousal; D001307:Auditory Perception; D001522:Behavior, Animal; D003214:Conditioning, Classical; D004372:Ducks; D005795:Generalization, Stimulus; D007173:Imprinting, Psychological; D014163:Transfer, Psychology; D014796:Visual Perception