The Lago Preto Conservation Concesssion is a 10,000 hectare block of Peruvian Amazon rainforest, to the east of Iquitos, along the Yavari river. The concession is rich in wildlife, and is particularly important for the endangered red uakari monkey. Researchers from the Durrell Institute of Conservation and Ecology (DICE) and the Wildlife Conservation Society (WCS), led by Richard Bodmer and Pablo Puertas have been visiting the area since 1990.