title: A comparative study of the activity patterns and behavior of Alouatta villosa and Ateles geoffroyi.
mesh_terms: D000819:Animal Communication; D000818:Animals; D001522:Behavior, Animal; D003672:Defecation; D004463:Ecology; D005247:Feeding Behavior; D005260:Female; D000882:Haplorhini / Q000145:classification; D008124:Locomotion; D008297:Male; D012934:Social Isolation; D013045:Species Specificity; D014554:Urination; D014828:Vocalization, Animal