Author
American Ornithologists' Union
741 results
Academy of Natural Sciences of Philadelphia
714 results
Cornell University. Laboratory of Ornithology
305 results
ProQuest (Firm)
60 results
SpringerLink (Online service)
55 results
Audubon, John James, 1785-1851
44 results
U.S. Fish and Wildlife Service
38 results
Lowther, Peter E.
30 results
National Audubon Society
28 results
Smithsonian Institution
28 results
Gale (Firm)
27 results
Peterson, Roger Tory, 1908-1996
27 results
American Association of Avian Pathologists
24 results
EBSCOhost
22 results
NetLibrary, Inc
22 results
Bent, Arthur Cleveland, 1866-1954
21 results
Bird, Robert Montgomery, 1806-1854
21 results
Grinnell, George Bird, 1849-1938
18 results
JSTOR (Organization)
18 results
Smithsonian/Folkways Recordings
18 results
Johnsgard, Paul A.
16 results
Kanopy (Firm)
13 results
United States National Museum
12 results
ebrary, Inc
12 results
Coues, Elliott, 1842-1899
11 results
Smithsonian Institution. Office of the Secretary
11 results
Baird, Spencer Fullerton, 1823-1887
10 results
National Institute of Education (U.S.). Educational Equity Group
10 results
Real Bird, Henry
10 results
United States. Bureau of Biological Survey
10 results
Chapman, Frank M. (Frank Michler), 1864-1945
9 results
Kroodsma, Donald E.
9 results
Linderman, Frank Bird, 1869-1938
9 results
Mayer, Jörg
9 results
Northwest Regional Educational Laboratory
9 results
Skutch, Alexander F. (Alexander Frank), 1904-2004
9 results
Swayne, David E.
9 results
Ainley, David G.
8 results
American Birding Association
8 results
Geological Survey (U.S.)
8 results
Library Pass, LLC
8 results
Longfellow, Henry Wadsworth, 1807-1882
8 results
Mowbray, Thomas B. (Thomas Bruce), 1940-
8 results
Snyder, Noel F. R.
8 results
United States. Congress. Senate. Committee on Environment and Public Works
8 results
Zim, Herbert S. (Herbert Spencer), 1909-1994
8 results
American Association of Zoo Veterinarians
7 results
American Bird Conservancy
7 results
American Museum of Natural History
7 results
Angelou, Maya
7 results
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