International Primate Protection League

The International Primate Protection League (IPPL; Societas Internationalis Primatibus Defendendis in Latin), founded in 1973 in Thailand by Dr. Shirley McGreal, is represented in 31 countries, and works toward the well being of non-human primates (NHP). Its advisory board consists of experts from zoology, anthropology, medicine, biology, veterinary medicine, and psychology.

The IPPL works in a number of areas. In countries where NHPs live, IPPL helps to create and preserve national parks and sanctuaries, and lobbies for bans on hunting and trapping. It raises money to fund sanctuaries, including one for gibbons obtained from research laboratories. In countries that import NHPs, IPPL monitors the trade, and the conditions in which zoo and laboratory NHPs are kept.

Prince Philip is the IPPL's royal patron. On the organization's 30th birthday, he wrote to them saying: "The League can look back with much pride on its very considerable achievements ... most primate populations around the globe are in a better state thanks to its activities."