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Literature Cited
Berger, C., K. Kridler, and J. Griggs. 2001. The Bluebird Monitor’s Guide to Bluebirds and Small Cavity Nesters. Harper Collins Publishers, Inc., New York, NY. braw.org/BRAW Articles
Close, W. Bluebird Houses: Round or oval entrance holes?
Gaard, G. Eliminating blackfly feeding on nestling bluebirds.
Davis, W.H. and P. Roca. 1995. Bluebirds and Their Survival. The University of Kentucky Press, Lexington.
Ehrlich, P.R., D.S. Dobkin, and D. Wheye. 1988. The Birder’s Handbook. Simon & Schuster, Inc., New York, NY.
Gill, F.B. 2007. Ornithology, 3rd Edition. W.H. Freeman, Co., New York, N.Y.
Gowaty, P.A. and J.H. Plissner. 1998. Eastern Bluebird (Sialia sialis). In The Birds of North America, No. 381 (A. Poole and F. Gill, eds.). The Birds of North America, Inc., Philadelphia.
Zeleny, L. The Bluebird: How You Can Help its Fight for Survival. 1978. Indiana University Press, Bloomington.