The Amboseli Elephant Research Project is a long-term research project on the ethology of the African elephant, operated by the nonprofit . The project studies the elephant's social behavior, age structure and population dynamics. It is the longest running study of elephant behavior in the wild, and has gathered data on life histories and association patterns for more than 2,000 individual elephants. The subjects of the Amboseli Elephant Research Project, mostly notably the elephant matriarch Echo, have been described at length in documentaries on PBS and Animal Planet.