I study the behavioral ecology of non-human primates to understand the evolution of social systems, the interplay of cooperative and competitive actions, and the effects of environmental change on the behavior of individuals, groups, and populations. My current research focuses on individual motivations for participating in between-group conflicts, using redtail monkeys in Kibale National Park, Uganda as my study system. In addition to running a field program at the Ngogo site in Kibale where I conduct behavioral observations, my work incorporates habitat monitoring and endocrinology (primarily urinary C-peptide of insulin and cortisol). My previous projects include an investigation of competitive interspecific interactions among blue monkeys, redtail monkeys, and grey-cheeked mangabeys at several sites in Kibale; and an examination of the motivations for female and male participation during between-group conflicts within redtail and mangabey communities at Ngogo.