title: Towards meeting Tinbergen's challenge.
authors.affiliation: Department of Zoology, Oklahoma State University, Stillwater, OK 74078, USA. ophir@okstate.edu
authors.forename: Alexander G
authors.initials: AG
authors.lastname: Ophir
mesh_terms: D000818:Animals; D001522:Behavior, Animal / Q000502:physiology*; D005106:Exploratory Behavior / Q000502:physiology*; D008297:Male; D017483:Receptors, Vasopressin / Q000502:physiology*; D020665:Septum of Brain / Q000502:physiology*; D020308:Songbirds / Q000502:physiology*; D014668:Vasotocin / Q000502:physiology*
chemical_list: D017483:Receptors, Vasopressin; C034862:vasotocin receptor; D014668:Vasotocin