Attack and defense in animal societies.
D000374:Aggression; D000819:Animal Communication; D000818:Animals; D001522:Behavior, Animal; D001717:Birds; D003220:Conflict, Psychological; D003441:Crowding; D003643:Death; D003674:Defense Mechanisms; D005260:Female; D005298:Fertility; D006801:Humans; D007323:Instinct; D008297:Male; D008322:Mammals; D011187:Posture; D051381:Rats; D012726:Sexual Behavior, Animal; D012919:Social Behavior; D013045:Species Specificity; D013731:Territoriality; D013997:Time Factors