International Primatological Society
Member Login 07/21/2018

The International Primatological Society was created to encourage all areas of non-human primatological scientific research, to facilitate cooperation among scientists of all nationalities engaged in primate research, and to promote the conservation of all primate species. The Society is organized exclusively for scientific, educational and charitable purposes.

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Project Monkey Island: Help needed!

Please join us in helping Puerto Rico's devastated families rebuild their community while helping them reconstruct the desperately needed infrastructure on 'Monkey Island' - a tiny island off Puerto Rico's eastern shore and home to over 1,500 free-roaming rhesus monkeys that has been a crucial site for scholars all over the world to study their behaviours since 1938! With the docks destroyed, countless trips to the island is the only way to get hundreds of pounds of food to the monkeys everyday because the small motor boat only holds a few bags of food at a time.

These daily efforts include clearing the island of debris and rebuilding the fresh water collection systems. All this consumes the day, slowing everyone's progress in rebuilding their own homes to a crawl. They need our help! So please visit to find out how you can help - donate, volunteer, or sponsor a giving package. To donate to #projectmonkeyisland, visit

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Featured Articles in the International Journal of Primatology

Primate Food Color: Useful Concept of Alluring Myth?

Kim Valenta, Omer Nevo, Colin A. Chapman

While the importance of frugivorous primates as seed dispersers is well established, the question of the extent to which they extert selective pressure on fruit color phenotypes is contested. Numerous studies have identified suites of primate fruit colours, but the lack of more.

Meat Eating by Wild Chimpanzees (Pan troglodytes schweinfurthii): Effects of Prey Age on Carcass Consumption Sequence

Ian C. Gilby, Daniel Wawrzyniak

Despite the fact that many primates consume vertebrate prey, surprisingly little is known about the nutritional benefits of eating meat for members of this diverse order. Although chimpanzees (Pan troglodytes) primarily eat plant source foods, especially fruit, the consume vertebrate prey with more.


Grantee spotlight

PROJECT UPDATE: Spatial distribution of the mantled howler monkey (Alouatta palliata) in relation to the plant structure in the Santa Emilia mountains, Danlí, Honduras.

J.J. Cruz

The Santa Emilia mountain (photo 1) is part of the "Macizo Montañoso Apaguíz-Apapuerta" a protected area of the Honduran Protected Areas System, which hosts a number of species of fauna and flora native to the country, including the howler monkey (Alouatta palliata; photo 2). This mountain more


Sleeping site seletion of Bale monkeys (Chlorocebus djamdjamensis) at Kokosa forest fragment in southern Ethiopia

Addisu Mekonnen

Sleeping site selection is an important aspect in primate behavioural ecology, where safe sleeping sites and trees are crucial for individual survival and fitness. Several hypotheses have been proposed for sleeping site selection of many primate species. Nothing is know, however, about the sleeping site selection of the little-known, endemic, bamboo-eating Bale monkeys in southern more







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