The Craighead twins, both wildlife biologists, have done major studies of western raptor populations and Yellowstone Park grizzly bears and have been pioneers in the use of radiotelemetry in studying wildlife populations. Frank Craighead worked for the U.S. Departments of Defense, Agriculture and Interior between 1950 and 1966 and was with the Atmospheric Sciences Research Center in New York from 1967 to 1977. He served as president of the Craighead Environmental Research Institute of Moose, Wyoming, beginning in 1955 and as a research associate at the University of Montana beginning in 1959.
John Craighead was a professor of zoology and forestry at the University of Montana beginning in 1952 and was leader of the Montana cooperative research unit of the U.S. Bureau of Sport Fisheries and Wildlife from 1952 to 1977. The brothers were instrumental in promoting enactment of the Wild and Scenic Rivers Act and were featured in a 1970 National Geographic special, "Wild River."
From the description of Frank C. and John J. Craighead Papers, 1920-1972. (University of Wyoming, American Heritage Center). WorldCat record id: 32345802
