screech owl



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Erlich, Paul, et al. Birds in Jeopardy. Stanford: Stanford University Press, 1992.

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Kjellen, Nils. "Differences in age and sex ratio among migrating and wintering raptors in Sweden." The Auk111(2), 1994, pp. 274-284.

Mansell, William. North American Birds of Prey. New York: William Morrow and Company, Inc., 1980.

Martin, Brian P. World Birds. Enfield, England: Guinness Books, 1987.

MacKenzie, John P.S. Birds of the World. Birds of Prey. Minocqua, Wisconsin: NorthWord, Inc., 1986.

Mundy, Peter, et al. The Vultures of Africa. London: Academic Press, 1992.

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Welty, Joel C. The Life of Birds. Third edition. Philadelphia: Saunders College Publishing, 1982.