Sources

Avery, T.  May 18, 2008.  Greater yellowlegs photo.  http://www.surfbirds.com/
cgibin/gallery/search2.cgi?species=&photographer=&location=&county=Utah&start=21

Barton, N. and J. Acorn.  1997.  Birds of the Pacific Northwest Coast.  Renton, WA.  Lone Pine Publishing.

Castro, P. and M. Huber.  2007.  Marine Biology 7th edition.  New York.  McGraw-Hill Higher Education.

Department of Fisheries and Oceans/Environment Canada.  May 18, 2008.  You Otter Know the Difference.  http://oceanlink.island.net/seaotterstewardship/otterknow.html

Dougherty, J.  May 18, 2008.  Sea Lion photo.  http//www.calphotos.berkley.edu/.

Dowland, S.  May 18, 2008.  Black Oystercatcher photo.  http://www.calphotos.berkley.edu/.

Folkens, P.  2002.  National Audubon Society Guide to Marine Mammals of the World.  New York.  Chanticleer Press Edition.

Getty, D.  May 18, 2008.  Bald Eagle photo.  http//www.calphotos.berkley.edu/.

Greer, T.  May 14, 2008.  Black-bellied Plover, Black Oystercatcher, and Killdeer, Killdeer eggs photos.  http//www.calphotos.berkley.edu/.

Hughes, R.  May 18, 2008.  Semipalmated plover photo.  http://www. surfbirds.com/cgi-bin/gallery/search2.cgi?species=Semipalmated%20Plover

ITIS.  May 14, 2008. http://www.itis.gov/index.html.

Morse, B., T. Aversa, and H. Opperman.  2003.  Birds of the Puget Sound Region.  Olympia, WA.  R.W. Morse Company.

O’Brien, M., R. Crossley and K. Karlson.  2006.  The Shorebird Guide.  New York.  Houghton Mifflin Company.

Paulson, D.  1993.  Shorebirds of the Pacific Nortwest.  Seattle.  University of Washington Press.

Paulson, D.  2005.  Shorebirds of North America.  New Jersey.  Princeton University Press.

Peterson, R.  1990.  Peterson Field Guides: Western Birds.  Boston, MA.  Houghton Mifflin Company.