Bird information was obtained from the following sources:

-Arizona Game and Fish Department. ?Arizona Wildlife Views-Special Edition: Birds of Arizona.? Vol.35, No.8, August 1992.

-National Audubon Society, ?National Audubon Society Field Guide to North American Birds: Western Region.? Knopf: Revised edition, September 1994.

-Sibley, David Allen. ?The Sibley Guide to Bird Life and Behavior.? Knopf: First edition, October 2001.

-Stokes, Donald and Lillian. ?Stokes Field Guide to Birds: Western Region.? Little, Brown and Company, 1996.

-Tekiela, Stan. "Birds of Arizona-Field Guide."  Adventure Publications, Inc. Cambridge, Minnesota, 2003.

-Cornell Lab of Ornithology "All About Birds" web-site.

-The Birds of North America Online web-site (from the Cornell Lab of Ornithologyand the American Ornithologists' Union).