Ph.D. Anthropology. UCLA
M.A. Anthropology. UCLA
B.A. Psychology. University of Wisconsin-Madison


Office: 1810 Hinman Avenue



I am a biological anthropologist who studies the causes and consequences of social behavior. To date, my research has primarily focused on a wild population of mountain gorillas (Gorilla beringei) in the Great Lakes region of Africa. This population has been monitored for 50 years, which provides unparalleled opportunities to understand how variation in social and ecological environments influences reproductive success and life history patterns in a long-lived mammal. I use behavioral, genetic, and hormonal data to gain a richer understanding of the evolution of mammalian sociality generally, and the hominid lineage specifically. Learn more on my personal website.



  1. Rosenbaum S, Vecellio V, & Stoinski TS. (2016). Observations of severe and lethal coalitionary attacks in wild mountain gorillas. Scientific Reports, 6, 37018.
  2. Rosenbaum S, Hirwa JP, Silk JB, Vigilant L, & Stoinski TS. (2016). Infant mortality risk and paternity certainty are associated with postnatal maternal behavior toward adult male mountain gorillas.
  3. Rosenbaum S, Hirwa JP, Silk JB, & Stoinski TS. (2016). Relationships between adult male and maturing mountain gorillas persist across developmental stages and social upheaval. Ethology, 122, 134-150.
  4. Rosenbaum S, Maldonado-Chapparo AA, & Stoinski TS. (2015). Group structure predicts variation in proximity relationships between male-female and male-infant pairs of mountain gorillas. Primates, 57, 17-28.

  5. Rosenbaum S, Hirwa JP, Silk JB, Vigilant L, & Stoinski TS. (2015). Male rank, not paternity, predicts male-immature relationships in mountain gorillas. Animal Behaviour, 104, 13-24.

  6. Rosenbaum S, Silk JB, & Stoinski TS. (2011). Male-immature relationships in multi-male groups of mountain gorillas. American Journal of Primatology, 71, 1-10.

  7. Stoinski TS, Rosenbaum S, Ngaboyamahina T, Vecellio V, Ndagijimana F, & Fawcett K. (2009). Patterns of male reproductive behavior in multimale groups of mountain gorillas: examining theories of reproductive skew. Behaviour, 146, 1193-1215.

  8. Stoinski TS, Vecellio V, Ngaboyamahina T, Ndagijimana F, Rosenbaum S, & Fawcett K. (2009). Proximate factors influencing dispersal decisions in male mountain gorillas. Animal Behaviour 77, 1155-1164.