Life-histories of the birds of eastern Pennsylvania /

Birds of western Pennsylvania /
by: Todd, W. E. Clyde (Walter Edmond Clyde), 1874-1969
Published: (1940)

Report on the birds of Pennsylvania. : With special reference to the food-habits, based on over four thousand stomach examinations /
Published: (1890)

Birds of the State College Region, Pennsylvania /
by: Wood, Merrill, 1908-1992
Published: (1952)

Weights of 151 species of Pennsylvania birds analyzed by month, age, and sex /
by: Clench, Mary H.
Published: (1978)

The birds of the Ligonier Valley /
by: Leberman, Robert C.
Published: (1976)

The ornithology of Chester County, Pennsylvania : by Franklin Lorenzo Burns, in co-operation with local ornithologists ...
by: Burns, Frank L. (Franklin Lorenzo), 1869-1946
Published: (1919)

Florida bird life /
by: Sprunt, Alexander, 1898-1973
Published: (1954)

The birds of Minnesota /
by: Roberts, Thomas S. (Thomas Sadler), 1858-1946
Published: (1936)

Addendum to Florida Bird-life (1954) /
by: Sprunt, Alexander, 1928-2007
Published: (1963)

Florida bird life /
by: Howell, Arthur H. (Arthur Holmes), 1872-1940
Published: (1932)

The bird life of Texas /
by: Oberholser, Harry C. (Harry Church), 1870-1963
Published: (1974)

The bird life of Louisiana /
by: Oberholser, Harry C. (Harry Church), 1870-1963
Published: (1938)

Oklahoma bird life /
by: Baumgartner, Frederick M. (Frederick Milton), 1910-
Published: (1992)

Directory to the bird-life of Kansas.
by: Johnston, Richard F.
Published: (1960)

Birds and birding on the Mississippi coast /
by: Toups, Judith A., 1930-
Published: (1987)

Chasing birds across Texas : a birding big year /
by: Adams, Mark Thomas
Published: (2003)

Birds of the Carolinas /
by: Potter, Eloise F., 1931-
Published: (1980)

Alabama birds /
by: Imhof, Thomas A.
Published: (1976)

Alabama birds /
by: Imhof, Thomas A.
Published: (1962)

A history of the birds of Colorado /
by: Sclater, William Lutley, 1863-1944
Published: (1912)

South Carolina bird life /
by: Sprunt, Alexander, 1898-1973
Published: (1970)

South Carolina bird life /
by: Sprunt, Alexander, 1898-1973
Published: (1949)

Georgia birds /
by: Burleigh, Thomas Dearborn, 1895-
Published: (1958)

Birds of Idaho /
by: Burleigh, Thomas Dearborn, 1895-
Published: (1972)

Brief studies in Texas bird life /
by: Burr, James Guy, 1872-
Published: (1936)

Handbook of California birds /
by: Brown, Vinson, 1912-1991
Published: (1973)

The birds of Texas /
by: Tveten, John L.
Published: (1993)

Arizona and its bird life ; a naturalist's adventures with the nesting birds on the deserts, grasslands, foothills, and mountains of southeastern Arizona /
by: Brandt, Herbert, 1884-
Published: (1951)

Bird life of East Texas /
by: Foreman, Connie
Published: (1982)

Birds of Wisconsin. /
by: Gromme, Owen J.
Published: (1963)

Iowa birds /
Published: (1984)

The birds of Ohio /
by: Peterjohn, Bruce G.
Published: (1989)

Alaskan bird-life as depicted by many writers /
by: Ingersoll, Ernest, 1852-1946
Published: (1914)

Handbook of California birds /
by: Brown, Vinson, 1912-1991
Published: (1965)

Birds of an Iowa dooryard /
by: Sherman, Althea Rosina, 1853-1943
Published: (1952)

Birds of Hawaii /
by: Munro, George Campbell, 1866-1963
Published: (1960)