Author
National Audubon Society
National Wildlife Federation
6 results
U.S. Fish and Wildlife Service
5 results
Farrand, John
4 results
Peterson, Roger Tory, 1908-1996
4 results
Roger Tory Peterson Institute
4 results
Peterson, Virginia Marie, 1925-
3 results
American Birding Association
2 results
Audubon, John James, 1785-1851
2 results
Bull, John L.
2 results
Cornell University. Laboratory of Ornithology
2 results
Terres, John K.
2 results
American Bird Conservancy
1 results
Association of Fish & Wildlife Agencies
1 results
Baker, John Hopkinson, 1894-
1 results
Bird Studies Canada
1 results
BirdLife International
1 results
Blake, Tupper Ansel
1 results
Bond, James, 1900-1989
1 results
Burnie, David
1 results
Burton, Robert, 1941-
1 results
Canadian Wildlife Service
1 results
Clark, William S., 1937-
1 results
Comision Nacional para el Conocimiento y Uso de la Biodiversidad (CONABIO) (Mexico)
1 results
Frances, Peter
1 results
Geological Survey (U.S.)
1 results
Halle, Louis Joseph, 1910-
1 results
Harrison, Hal H.
1 results
Harwood, Michael, 1934-
1 results
Hawk Mountain Sanctuary Association
1 results
Hollom, P. A. D. (Philip Arthur Dominic)
1 results
Ingersoll, Ernest, 1852-1946
1 results
Kaufman, Kenn
1 results
Klamath Bird Observatory
1 results
Koford, Carl B.
1 results
Line, Les
1 results
Mountfort, Guy
1 results
NABCI Canada
1 results
National Association of Audubon Societies for the Protection of Wild Birds and Animals
1 results
National Committee of the Audubon Societies of America
1 results
Nature Conservancy (U.S.)
1 results
North American Hawk Migration Conference Syracuse, N.Y.
1 results
Ogden, John C., 1938-
1 results
Pettingill, Olin Sewall, 1907-2001
1 results
Playa Lakes Joint Venture
1 results
Rawls, Walton H.
1 results
Reilly, Edgar M.
1 results
Rich, Terrell D.
1 results
Russell, Franklin, 1922-
1 results
Sibley, David, 1961-
1 results
more…