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Additional data on the host relations of the parasitic cowbirds.

Friedmann, Herbert, 1900-1987.
Washington, Smithsonian Institution, 1966. 1966

Bartolomé Bermejo's "Episcopal Saint" : a study in medieval Spanish symbolism (with eleven plates)

Friedmann, Herbert, 1900-1987.
Washington : Smithsonian Institution, 1966. 1966

The evolutionary history of the avian genus Chrysococcyx.

Friedmann, Herbert, 1900-1987.
Washington, Smithsonian Institution Press, 1968. 1968

Evolutionary trends in the avian genus Clamator

Friedmann, Herbert, 1900-1987.
Washington : Smithsonian Institution, 1964. 1964

The forms of the black hawk-eagle (with one plate)

Friedmann, Herbert, 1900-1987.
Washington : Smithsonian Institution, 1950. 1950

A further contribution to knowledge of the host relations of the parasitic cowbirds

Friedmann, Herbert, 1900-1987.
Washington, D.C. : Smithsonian Institution Press, 1977. 1977

The honey-guides.

Friedmann, Herbert, 1900-1987.
Washington, Smithsonian Institution, 1955. 1955

Host relations of the parasitic cowbirds

Friedmann, Herbert, 1900-1987.
Washington, D.C. : Smithsonian Institution, 1963. 1963

Mirandolle's forest falcon (with two plates)

Friedmann, Herbert, 1900-1987.
Washington : Smithsonian Institution, 1948. 1948

The natural-history background of camouflage,

Friedmann, Herbert, 1900-1987.
Washington, D.C., Smithsonian Institution, 1942. 1942

A new heron and a new owl from Venezuela.

Friedmann, Herbert, 1900-1987.
Washington, Smithsonian Institution, 1949. 1949

The problem of the Viduinae in the light of recent publications.

Friedmann, Herbert, 1900-1987.
Washington, Smithsonian Institution, 1962. 1962

The symbolic goldfinch : its history and significance in European devotional art / Herbert Friedmann

Friedmann, Herbert, 1900-1987.
[Washington] : Pantheon Books, [1946] 1946