Author
Bent, Arthur Cleveland, 1866-1954
29
Academy of Natural Sciences of Philadelphia
21
American Ornithologists' Union
21
Peterson, Roger Tory, 1908-1996
21
Audubon, John James, 1785-1851
18
National Audubon Society
15
Chapman, Frank M. (Frank Michler), 1864-1945
10
Sutton, George Miksch, 1898-1982
10
Sibley, David, 1961-
7
American Museum of Natural History
6
Baird, Spencer Fullerton, 1823-1887
6
Bull, John L.
6
Coues, Elliott, 1842-1899
6
Lack, David, 1910-1973
6
Ridgway, Robert, 1850-1929
6
Skutch, Alexander F. (Alexander Frank), 1904-2004
6
Berger, Andrew John, 1915-1995
5
Blanchan, Neltje, 1865-1918
5
Burroughs, John, 1837-1921
5
Cooper Ornithological Society
5
Cornell University. Laboratory of Ornithology
5
Fuertes, Louis Agassiz, 1874-1927
5
Johnsgard, Paul A.
5
Mountfort, Guy
5
National Geographic Society (U.S.)
5
Perrins, Christopher M.
5
Austin, Oliver Luther, 1903-1988
4
Brauning, Daniel W.
4
Brewer, T. M. (Thomas Mayo), 1814-1880
4
Halle, Louis Joseph, 1910-1998
4
Harrison, Colin James Oliver
4
Headstrom, Richard, 1902-1985
4
National Wildlife Federation
4
Nuttall, Thomas, 1786-1859
4
Pough, Richard H. (Richard Hooper), 1904-2003
4
Rand, Austin Loomer, 1905-1982
4
U.S. Fish and Wildlife Service
4
Wilson, Alexander, 1766-1813
4
Acworth, Bernard, 1885-1963
3
Allen, Arthur A. (Arthur Augustus), 1885-1964
3
Angell, Tony
3
Baicich, Paul J.
3
Berthold, P. (Peter), 1939-
3
Birkhead, Tim
3
Blake, Emmet Reid, 1908-1997
3
Bruun, Bertel
3
Burton, Robert, 1941-
3
Cameron, Ad, 1939-
3
Campbell, Bruce, 1912-1993
3
Dean, Robert, 1955-
3
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