Reports of male dominance in greater bamboo lemurs were not supported by data. We studied agonistic behavior in one captive group and could confirm this assertion, which sets this species apart from all other group-living lemurs.

In the context of the ManyPrimates initiative, our long-tailed macaques (Macaca fascicularis) rarely exchanged a given food item for a larger food reward at a later time. We tested whether possession of a high-value food item affected their performance and found that macaques displayed improved abilities when the value of the exchange item is reduced. This suggests that the possession of a high-value item contributed to the low performance of the monkeys in the original exchange protocol.

Water is an essential commodity for life and is fundamental for metabolic processes. In free-living environments, species may use different strategies, abilities, and resources to access water. Here, we report on water consumption by Ateles chamek and Sapajus apella from the same tree source. These observations show that species use different strategies to access and consume water.

A population of 142 Mount Kenya guerezas in 22 family groups was reintroduced into Karura Forest between May 2014 and March 2016. This study evaluated changes in group size, composition, number of births and deaths, natal dispersal, and post-release settlement. Results showed increased group size and number of births, indicating successful adaptation. Settlement along riverine ecosystems informs release habitat selection and provides insights into future primate translocations.