Gavin Maxwell FRSL FZS FRGS was a British naturalist and author, best known for his non-fiction writing and his work with otters. He wrote the book Ring of Bright Water (1960) about how he brought an otter back from Iraq and raised it in Scotland. The otter was of a previously unknown sub-species which was subsequently named after Maxwell. Ring of Bright Water sold more than a million copies and was made into a film starring Bill Travers and Virginia McKenna in 1969.

Ring of Bright Water is a book by Gavin Maxwell about his life in a remote house in coastal Scotland where he kept several wild otters as pets. First published in 1960, it became a best seller and is considered a literary masterpiece, eventually selling over two million copies. A fictionalised film of the same name was made from it and released in 1969.