The study of raptor populations /

A guide to hawk watching in North America /
by: Heintzelman, Donald S.
Published: (1979)

North American birds of prey /
by: Sprunt, Alexander, 1898-1973
Published: (1955)

Birds of prey of northeastern North America /
by: Hausman, Leon Augustus, 1888-1966
Published: (1948)

Life histories of North American birds of prey.
by: Bent, Arthur Cleveland, 1866-1954
Published: (1970)

Population ecology of raptors /
by: Newton, Ian, 1940-
Published: (1979)

A field guide to hawks of North America /
by: Clark, William S., 1937-
Published: (1987)

Birds of prey /
by: Scholz, Floyd
Published: (1993)

The wind masters : the lives of North American birds of prey /
by: Dunne, Pete, 1951-
Published: (1995)

Raptor! : a kid's guide to birds of prey /
by: Laubach, Christyna M.
Published: (2002)

Raptors : the birds of prey /
by: Weidensaul, Scott
Published: (1996)

Raptors : a field guide to survey and monitoring /
by: Hardey, Jon
Published: (2006)

Raptors : a field guide for surveys and monitoring /
by: Hardey, Jon
Published: (2009)

Raptors : the birds of prey /
by: Weidensaul, Scott
Published: (1996)

Raptors in human landscapes : adaptations to built and cultivated environments /
Published: (1996)

Status reports on twelve raptors /
by: Evans, David L. (David Lawrence), 1949-
Published: (1982)

Raptors of the world /
by: Ferguson-Lees, James
Published: (2005)

The raptors of Arizona /
Published: (1998)

Raptor watch : a global directory of raptor migration sites /
Published: (2000)

Raptors of Texas : a natural history of diurnal birds of prey /
by: Farquhar, Charles Craig, 1954-, et al.
Published: (2022)

Guide to owl watching in North America /
by: Heintzelman, Donald S.
Published: (1984)

Nesting ecology of golden eagles and other raptors in southeastern Montana and northern Wyoming. Distribution and abundance of golden eagles and other raptors in Campbell and Converse counties, Wyoming.
Published: (1990)

The migrations of hawks /
by: Heintzelman, Donald S.
Published: (1986)

Ecogeographical variations in size and proportions of song sparrows (Melospiza melodia) /
by: Aldrich, John Warren
Published: (1984)

Cassin's sparrow (Aimophila cassinii) : status assessment and conservation plan /
by: Ruth, Janet M.
Published: (2000)

Australian birds of prey : the biology and ecology of raptors /
by: Olsen, Penny, 1949-
Published: (1995)

Australian birds of prey : the biology and ecology of raptors /
by: Olsen, Penny, 1949-
Published: (1995)

Collins guide to the birds of prey of Britain and Europe, North Africa and the Middle East /
by: Gensbl, Benny
Published: (1984)

World Conference on Birds of Prey, Vienna, 1-3 October, 1975 : report of proceedings /
Published: (1977)

Species relationships in the avian genus Aimophila /
by: Wolf, Larry L.
Published: (1977)

North American ducks, geese, & swans /
by: Heintzelman, Donald S.
Published: (1978)

Sandhill and whooping cranes : ancient voices over America's wetlands /
by: Johnsgard, Paul A.
Published: (2011)

Sandhill and whooping cranes : ancient voices over America's wetlands /
by: Johnsgard, Paul A.
Published: (2011)

A gathering of shore birds /
by: Hall, Henry Marion, 1877-
Published: (1960)

A gathering of shore birds /
by: Hall, Henry Marion, 1877-
Published: (1960)

Life histories of North American diving birds ; order Pygopodes.
by: Bent, Arthur Cleveland, 1866-1954
Published: (1946)

Autumn hawk flights ; the migrations in eastern North America /
by: Heintzelman, Donald S.
Published: (1975)