My research revolves around understanding how young primates grow up and learn to navigate their worlds. As an evolutionary anthropologist, I use my work as a lens to better understand our evolutionary history. Since finishing my PhD, I've worked with Dr. Zarin Machanda, Dr. Alex Rosati, and the Kibale Chimpanzee Project to bridge behavioral and cognitive research to apply chimpanzees as a model species for understanding the origins of human-like leadership. Currently, I'm a Lecturer in the Department of Human Evolutionary Biology at Harvard where I joined the Pan Lab to compare chimpanzee developmental patterns with their closest cousins, bonobos. In addition to my research on great ape development, I also direct the Nature's Valley Baboon Project where we apply our observations about wild baboon behavior to inform local conservation plans from forest restoration to wildlife management.
This website is about my ongoing research, public outreach, and a few travel adventures for good measure.
Recent Publications
Including live links, but please reach out if you hit a paywall ([email protected]). I'm always happy to send a PDF.
Sabbi, K. H., Kurilla, S. E., Monroe, I. G., Zhang, Y., Menante, A., Cole, M. F., ... & Machanda, Z. P. (2024). Ecological variation in adult social play reveals a hidden cost of motherhood for wild chimpanzees. Current Biology, 34(6), P1364-1369.E2.
Write up with Zarin Machanda for The Conversation - Playing with the kids is important work for chimpanzee mothers
And translated into French for good measure - Les mères chimpanzés continuent de jouer avec leurs petits....
Sabbi, K. H., Emery Thompson, M., Machanda, Z. P., Otali, E., Wrangham, R. W., & Muller, M. N. (2021). Sex differences in early experience and the development of aggression in wild chimpanzees. Proceedings of the National Academy of Sciences, 118 (12) e2017144118.
Research summary from the Kibale Chimpanzee Project
University of New Mexico Press Release
Sabbi, K. H., Muller, M. N., Machanda, Z. P., Otali, E., Fox, S. A., Wrangham, R. W., & Emery Thompson, M. (2020). Human‐like adrenal development in wild chimpanzees: A longitudinal study of urinary dehydroepiandrosterone‐sulfate and cortisol. Special Joint Issue of American Journal of Primatology and Developmental Psychobiology, 82(11), e23064.
Emery Thompson, M., & Sabbi, K. H. (2024). Evolutionary demography of the great apes. In: Human Evolutionary Demography. Eds: R. Sear, O. Burger. Available at: osf.io/d2thj/
Muller, M. N., Sabbi, K. H., Thompson, M. E., Enigk, D. K., Hagberg, L., Machanda, Z. P., ... & Wrangham, R. W. (2024). Age-related reproductive effort in male chimpanzees: terminal investment or alternative tactics?. Animal Behaviour, 213, 11-21.
Rosati, A. G., Sabbi, K. H., Bryer, M. A., Barnes, P., Rukundo, J., Mukungu, T., ... & Machanda, Z. P. (2023). Observational approaches to chimpanzee behavior in an African sanctuary: Implications for research, welfare, and capacity‐building. American Journal of Primatology, e23534.
Wilke, C., Lahiff, N. J., Sabbi, K. H., Watts, D. P., Townsend, S. W., & Slocombe, K. E. (2022). Declarative referential gesturing in a wild chimpanzee (Pan troglodytes). Proceedings of the National Academy of Sciences, 119(47), e2206486119.
Towle, I., Irish, J. D., Sabbi, K. H., & Loch, C. (2022). Dental caries in wild primates: Interproximal cavities on anterior teeth. American Journal of Primatology, 84(1), e23349.
Emery Thompson, M., Fox, S. A., Berghänel, A., Sabbi, K. H., Phillips-Garcia, S., Enigk, D. K., ... & Muller, M. N. (2020). Wild chimpanzees exhibit humanlike aging of glucocorticoid regulation. Proceedings of the National Academy of Sciences, 117(15), 8424-8430.
Emery Thompson, M., Machanda, Z. P., Fox, S. A., Sabbi, K. H., Otali, E., Thompson González, N., ... & Wrangham, R. W. (2020). Evaluating the impact of physical frailty during ageing in wild chimpanzees (Pan troglodytes schweinfurthii). Philosophical Transactions of the Royal Society B, 375(1811), 20190607.
Emery Thompson, M., Muller, M. N., Sabbi, K., Machanda, Z. P., Otali, E., & Wrangham, R. W. (2016). Faster reproductive rates trade off against offspring growth in wild chimpanzees. Proceedings of the National Academy of Sciences, 113(28), 7780-7785.
Write up with Zarin Machanda for The Conversation - Playing with the kids is important work for chimpanzee mothers
And translated into French for good measure - Les mères chimpanzés continuent de jouer avec leurs petits....
Sabbi, K. H., Emery Thompson, M., Machanda, Z. P., Otali, E., Wrangham, R. W., & Muller, M. N. (2021). Sex differences in early experience and the development of aggression in wild chimpanzees. Proceedings of the National Academy of Sciences, 118 (12) e2017144118.
Research summary from the Kibale Chimpanzee Project
University of New Mexico Press Release
Sabbi, K. H., Muller, M. N., Machanda, Z. P., Otali, E., Fox, S. A., Wrangham, R. W., & Emery Thompson, M. (2020). Human‐like adrenal development in wild chimpanzees: A longitudinal study of urinary dehydroepiandrosterone‐sulfate and cortisol. Special Joint Issue of American Journal of Primatology and Developmental Psychobiology, 82(11), e23064.
Emery Thompson, M., & Sabbi, K. H. (2024). Evolutionary demography of the great apes. In: Human Evolutionary Demography. Eds: R. Sear, O. Burger. Available at: osf.io/d2thj/
Muller, M. N., Sabbi, K. H., Thompson, M. E., Enigk, D. K., Hagberg, L., Machanda, Z. P., ... & Wrangham, R. W. (2024). Age-related reproductive effort in male chimpanzees: terminal investment or alternative tactics?. Animal Behaviour, 213, 11-21.
Rosati, A. G., Sabbi, K. H., Bryer, M. A., Barnes, P., Rukundo, J., Mukungu, T., ... & Machanda, Z. P. (2023). Observational approaches to chimpanzee behavior in an African sanctuary: Implications for research, welfare, and capacity‐building. American Journal of Primatology, e23534.
Wilke, C., Lahiff, N. J., Sabbi, K. H., Watts, D. P., Townsend, S. W., & Slocombe, K. E. (2022). Declarative referential gesturing in a wild chimpanzee (Pan troglodytes). Proceedings of the National Academy of Sciences, 119(47), e2206486119.
Towle, I., Irish, J. D., Sabbi, K. H., & Loch, C. (2022). Dental caries in wild primates: Interproximal cavities on anterior teeth. American Journal of Primatology, 84(1), e23349.
Emery Thompson, M., Fox, S. A., Berghänel, A., Sabbi, K. H., Phillips-Garcia, S., Enigk, D. K., ... & Muller, M. N. (2020). Wild chimpanzees exhibit humanlike aging of glucocorticoid regulation. Proceedings of the National Academy of Sciences, 117(15), 8424-8430.
Emery Thompson, M., Machanda, Z. P., Fox, S. A., Sabbi, K. H., Otali, E., Thompson González, N., ... & Wrangham, R. W. (2020). Evaluating the impact of physical frailty during ageing in wild chimpanzees (Pan troglodytes schweinfurthii). Philosophical Transactions of the Royal Society B, 375(1811), 20190607.
Emery Thompson, M., Muller, M. N., Sabbi, K., Machanda, Z. P., Otali, E., & Wrangham, R. W. (2016). Faster reproductive rates trade off against offspring growth in wild chimpanzees. Proceedings of the National Academy of Sciences, 113(28), 7780-7785.