Olin Sewall Pettingill Jr.

Olin Sewall Pettingill Jr. (October 30, 1907 – December 11, 2001) was an American naturalist, author and filmmaker, president of the Wilson Ornithological Society from 1948 to 1950, a member of the board of directors of the National Audubon Society from 1955 to 1974, and a Life Fellow of the American Ornithologists' Union. Provided by Wikipedia