Photo of Sylvain

Sylvain Nyandwi

[email protected]


I am broadly interested in primate conservation and behavioral ecology. In particular, I am interested in how seasonal variation in food availability influences social interactions and stress in chimpanzees, as measured through hormones such as cortisol.   


MA in General psychology, West Chester University of Pennsylvania, 2014 

BS in Biology & Conservation, National University of Rwanda, 2008

Year Entered GW Program: 2017

Advisor: Carson Murray


Chancellor, R. L., Rundus, A. S., & Nyandwi, S. (2016). Chimpanzee seed dispersal in a montane forest fragment in Rwanda. American Journal of Primatology, 9999, 1-8.

Rundus, A. S., Fitzgerald, T., Biemuller, R., Ngov, T., DeLong, K & Nyandwi, S. (2015) Age-related plasticity in male mate choice decisions by Schizocosa retrorsa wolf spiders. Animal Behaviour, 107, 233-238.

Chancellor, R. L., Rundus, A. S., & Nyandwi, S. (2012). The influence of seasonal variation on chimpanzee (Pan troglodytes schweinfurthii) fallback food consumption, nest group size, and habitat use in Gishwati, a montane rainforest fragment in Rwanda. International Journal of Primatology, 33, 115-133.

Research Experience

2015-2017: Primate Enrichment Technician. Promoting captive primate welfare by implementing social introductions, collecting behavioral data, conducting data analysis and leading the journal club, Tulane National Primate Research Center.

2014: Master’s thesis: “Influence of Seasonal Variation and Anthropogenic Activities on Chimpanzee (Pan troglodytes schweinfurthii) Nesting Behavior in Gishwati National Park, Rwanda.”

2010-2011: Research Manager. Habituation and identification of chimpanzees, collection of data on feeding ecology, social behavior, crop raiding behavior, and tree phenology,  Great Ape Trust of Iowa/Gishwati Area Conservation Program, Rubavu, Western Province, Rwanda.

2008-2010: Research Assistant. Collecting data on chimpanzee nesting behavior, anthropogenic activity in the forest, chimpanzee fecal diet sampling, and chimpanzee virus and parasite sampling, Great Ape Trust of Iowa/Gishwati Area Conservation Program, Rubavu, Western Province, Rwanda.

2008: Intern, Dian Fossey Gorilla Fund International, Musanze, Northern Province, Rwanda: Behavioral data collection and monitoring of gorillas and other large mammals in Volcanoes National Park.