Robert Thomas Orr (August 17, 1908 – June 23, 1994) was an American biologist known for his work as a zoologist and natural historian.
and Ph.D. degrees were earned at the University of California, Berkeley while studying in the laboratory of Joseph Grinnell.
[1] Orr's research consisted studies of seals, sea lions and whales along the California coast.
[2] In addition to his work in mammalogy and ornithology, Orr was considered an authority on wild mushrooms.
[3] Orr served as President of the Pacific Division of the American Association for the Advancement of Science from 1976 to 1977.