Effect of looming object on immobility reaction in gallinaceous birds (Gallus gallus).
D000818:Animals; D001522:Behavior, Animal; D002645:Chickens / Q000502:physiology*; D005239:Fear; D006185:Habituation, Psychophysiologic; D006234:Handling, Psychological; D006990:Hypnosis; D007103:Immobilization; D009043:Motor Activity; D013045:Species Specificity; D014796:Visual Perception