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Appenzeller, Tim, et al. “The Heat Is On.” National Geographic, vol. 206, Sept. 2004: 12–75. Curson, Jon, David Quinn, and David Beadle. Warblers of the Americas. New York: Houghton Mifflin, 1994. Ehrlich, Paul R., David S. Dobkin, and Darryl Whey. The Birder’s Handbook. New York: Simon and Schuster, 1988. Farrand, John, ed. The Audubon Society Master Guide to Birding. 3 vols. New York: Knopf, 1983. Gill, Frank B. Ornithology. New York: W. H. Freeman, 1995. Hvoslef, Johan C. Diaries 1881–1918. Unpublished. Minneapolis: University of Minnesota Archives; Elmer Andersen Library. Kaufman, Kenn. Lives of North American Birds. New York: Houghton Mifflin, 1996. Leahy, Christopher. The Birdwatcher’s Companion. New York: Hill and Wang, 1982. Pearson, T. Gilbert, ed. Birds of America. Garden City, New York: Doubleday, 1917. Rising, James D. The Sparrows of the United States and Canada. San Diego: Academic Press, 1996. Roberts, Thomas S. The Birds of Minnesota. Minneapolis: University of Minnesota, 1932. Sibley, David A. The Sibley Guide to Birds. New York: Knopf, 2000. Skutch, Alexander F. Parent Birds and Their Young. Austin: University of Texas, 1976. Stokes, Donald W., and Lillian Q. Stokes. A Guide to Bird Behavior. 3 vols. Toronto: Little, Brown, 1979. 101 RECOMMENDED READING ...

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