After 40 years, four groups of chimpanzees of the Taï Chimpanzee Project have been habituated to human observers and are followed daily. Data collected on the different groups allow us to follow long-term trends in the socioecology of the Taï chimpanzees. Chimpanzees are ecologically ?exible omnivores with broad diets comprising mainly plant and animal foods. Like other ecologically ?exible non-human primates with broad diets, their diets vary across time and habitats. Strong interannual changes have been shown to exist in the food composition of the wild chimpanzee’s diet. Because of this, only data collected over time can reveal their diversified food selection. In this chapter we list all of the plant and animal foods consumed by the two oldest habituated chimpanzee groups in the Taï Forest. We document variation of use between groups and across years. We analyse the consumption variations of some key food species within the two communities, with a focus on plant components of the diet. As for plant foods, the chimpanzees have been seen to feed on 503 food items from 363 plant species. Fruit represents 73.76% of number of food species and 85% when one considers feeding time.