Save the Rhino International (SRI) is a UK-based conservation charity. It is Europe's largest single-species rhino charity, in terms of funds raised, grants made, and profile and positioning. SRI began fundraising for in situ rhino conservation projects in 1992 and was formally registered as a charity in 1994. One of SRI's founder patrons was the British writer and humorist Douglas Adams,[1] who was also known to be a conservation movement enthusiast.