William Moy Stratton Russell (1925 – 2006), also known as Bill Russell, was a British zoologist, best known for writing, along with R. L. Burch (1926-1996) The Principles of Humane Experimental Technique (1959), a landmark in the humane use of animals in research, education and testing. Russell and Burch introduced the concept of the Three Rs (replacement, reduction and refinement) in the scientific community and provided a blueprint for combining animal welfare considerations and quality of research.