The Subspecies of the Mountain Chickadee

Joseph Grinnell

Joseph P. Grinnell was an American field biologist and zoologist. He made extensive studies of the fauna of California, and is credited with introducing a method of recording precise field observations known as the Grinnell System. He served as the first director of the Museum of Vertebrate Zoology at the University of California, Berkeley from the museum's inception in 1908 until his death.