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KEY TO ANNOTATED DESCRIPTIONS OF BIRD SOUNDS

 

            (F) Forrand, J., Jr. 1983. The Audubon Society master guide to birding. 3 vols. Alfred A. Knopf, New York.

            (H) Heintzelman, Donald S. 1982. A guide to hawk watching in North America. Keystone Books, The Pennsylvania State University Press, University Park and London. 284 pp.

            (L) Larrison, Earl J., and Klaus G. Sonnenberg. 1968. Washington birds and their location and identification. The Seattle Audubon Society, Seattle, Washington. 258 pp.

            (N) National Geographic Society. 1983. Field guide to the birds of North America. The National Geographic Society, Washington, D.C. 464 pp.

            (P) Peterson, R. T. 1961. A field guide to western birds. Houghton-Mifflin, Boston, Massachusetts. 309 pp.

            (R) Robbins, C. S., B. Bruun, and H. S. Zim. 1983. A guide to field identification: birds of North America. Golden, New York. 360 pp.

            (U) Udvardy, M. D. F. 1977. The Audubon Society field guide to North American birds: western region. Knopf, New York. 854 pp.