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Review of literature on the natural history of howling monkeys
Field procedures and reactions of howlers to an observer
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activity adaptation adult females adult males apparently approached associated attempts avoid Barro Colorado Island become begin behave behavior believe branches capuchins carried cent clan clan males close complemental males conditioned continued co÷rdination copulation crossing defensive described direction distance eaten example feeding feet field forest four frequently fruit function given ground hand howlers howling monkeys important indicate individuals infant instances juvenile kind later leaves limb located locomotion London means minutes months mother moved movements noted observed occur Panama particular patterns period PLATE play population positions possible postures primary primates processes progression range reactions reference region relations relatively responses rest roars seconds seen separated sexual sexual activity shown similar situations social relations specific stimulation subgrouping tail territory tion tongue tree usually vocalizations yards young animals