The field notes of M. Moynihan document his behavioral observations of Alouatta (primates) on Barro Colorado Island, Panama, 1958-1961. Pages are numbered. The notes are arranged into three groupings. Entries are dated and headed with location. Describes extended observations of the interactions of a group of primates in captivity, their vocalizations, behaviors eating, and behaviors when separated. Individuals are referred to by assigned letters. Includes sketch of primate's behavior.
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