Alderto, David. 2006. The Complete Illustrated Encyclopedia of the Birds of the World.
    Southwater, London, England.

BioKIDS-Kids' Inquiry of Diverse Species 2003.
    <URL:>. Accessed 27 March

Cornell Lab of Ornithology 2010.
    <URL: >. Accessed 15 March 2010.

Hancock, James. 1999. Birds of the Wetlands. Academic Press, San Diego, California, USA.

Kaufman, Kenn. 2000. Birds of North America. Houghton Mifflin Company, New York, USA.

Life Histories of Familiar North American Birds 1927.
    <URL: >. Accessed 10 April 2010.

Myers, P., R. Espinosa, C. S. Parr, T. Jones, G. S. Hammond, and T. A. Dewey.
    The Animal Diversity Web 2008. <URL: >. Accessed 10 April 2010.

Netherton, John. 1998. North American Wading Birds. Voyaguer Press, Stillwater,
    Minnesota, USA.

Our Incredible World 2010.
    Accessed 27 March 2010.

Ryser, Fred A., and Jennifer Dewey. 1985. Birds of the Great Basin: a Natural History. University
    of Nevada, Reno, Nevada, USA