Primatologists interested in how ecological conditions shape the behavior and social strategies of their study subjects must also collect detailed data on the diversity, abundance, and distribution of resources of potential importance. Thus, ongoing fieldwork includes documenting and understanding spatial patterns in plant diversity and temporal patterns of flowering and fruiting in neotropical forests. Since 1994, almost without interruption, our research team has collecting data every month on the phenological status of a large subset of the trees located in five hectares of botanical plots. This now represents one of the largest databases of phenological information available for an Amazonian rainforest site. Additionally, some of the plots are periodically recensused to look at temporal changes in floristic composition and biomass. These data form a part of the Amazon Forest Inventory Network (RAINFOR) database, which compiles information from a large set of Amazonian rainforest sites for the purposes of monitoring the long-term dynamics and productivity of these forests in response to global climate change.