He is a member of Wolfson College, Cambridge and a Fellow of the Royal Society of Arts.

He was a member of the British Ornithologists' Union and a Fellow of the Zoological Society of London.

Suhl is a member of the National Academy of Sciences and a Fellow of the American Physical Society.

He was also a member of the Cricket Club of India and a Fellow of the Royal Historical Society.

He is a member of the National Academy of Education and a Fellow of the American Educational Research Association.

Stillman is member of the National Academy of Sciences and a Fellow of the Royal Society.

He is a member of the National Academy of Engineering and a Fellow in various professional societies.

He became a member of the American Ornithologists' Union in 1942, an Elective member in 1973 and a Fellow in 1990.

He was a member of the Imperial Academy of Japan and a Fellow of the British Academy.

He is also a member of the Institute of Medicine and a Fellow of the American Association for the Advancement of Science.