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Alt, D.D., and D.W. Hyndman. 1984. Roadside Geology of Washington. Mountain Press, Missoula, Montana.

American Birding Association. 2014. ABA Checklist: Birds of the Continental United States and Canada. Version 7.7. American Birding Association, Colorado Springs.

American Ornithologists’ Union. 1998. Checklist of North American Birds. 7th ed. American Ornithologists’ Union, Washington, DC. Supplements appear annually in the July Auk.

Bell, B.H., and G. Kennedy. 2006. Birds of Washington State. Distributed by Lone Pine Publishing, Auburn, Washington.

Cannings, R., and R. Cannings. 2013. Birdfinding in British Columbia. Greystone Books, Vancouver. (With the publication of this excellent book, our Washington guide now no longer covers British Columbia sites adjacent to the Washington border.)

Cassidy, K.M. 1997. Land Cover of Washington State: Description and Management. Vol. 1 in Washington State Gap Analysis—Final Report (K.M. Cassidy, C.E. Grue, M.R. Smith, and K.M. Dvornic, eds.). Washington Cooperative Fish and Wildlife Research Unit, University of Washington, Seattle.

Cullinan, T. (compiler). 2001. Important Bird Areas of Washington. Audubon Washington, Olympia.

Dawson, W.L. 1909. The Birds of Washington. 2 vols. Occidental Publishing Company, Seattle. View and Explore Data. 2015. (Online sightings data for locations, seasons and species).

Franklin, J.F., and C.T. Dyrness. 1973. Natural Vegetation of Oregon and Washington. Pacific Northwest Forest and Range Experiment Station, Forest Service, U.S. Department of Agriculture, Portland.

Freelan, S. “Map of the Salish Sea (Mer des Salish) & Surrounding Basin.” Web. Stefan Freelan, Western Washington University, Department of Environmental Studies, Huxley College of the Environment. April 25, 2015.

The Great Washington State Birding Trail. Cascade Loop (2002), Coulee Corridor Scenic Byway (2003), Southwest Loop (2005), Olympic Loop (2006), Palouse to Pines Loop (2009), Sun and Sage Loop (2009), Puget Loop (2011), Audubon Washington, Olympia. (Large folding maps.)

Hunn, E.S. 2012. Birding in Seattle and King County (2nd ed.). Seattle Audubon Society, Seattle.

Jewett, S.A., W.P. Taylor, W.T. Shaw, and J.W. Aldrich. 1953. Birds of Washington State. University of Washington Press, Seattle.

Krosby, M., and Rohwer, S. 2010. “Ongoing Movement of the Hermit Warbler X Townsend’s Warbler Hybrid Zone.” PLoS ONE, 5(11), e14164. doi:10.1371/journal.pone.0014164

Kruckeberg, A.R. 1991. The Natural History of Puget Sound Country. University of Washington Press, Seattle and London.

Lewis, M.G., and F.A. Sharpe. 1987. Birding in the San Juan Islands. Mountaineers, Seattle.

Marshall, D.B., M.G. Hunter, and A.L. Contreras (eds.). 2003. Birds of Oregon: A General Reference. Oregon State University Press, Corvallis.

Morse, B. 2001. A Birder’s Guide to Coastal Washington. R.W. Morse Company, Olympia.

Morse, B., T. Aversa, and H. Opperman. 2015. Birds of the Puget Sound Region. (14th printing revised). R.W. Morse Company, Olympia.

Nehls, H., M. Denny, and D. Trochlell. 2008. Birds of Inland Northwest and Northern Rockies. R.W. Morse Company, Olympia.

O’Connor, G., and K. Wieda. 2001. Northwest Arid Lands: An Introduction to the Columbia Basin Shrub-Steppe. Battelle Press, Columbus, Ohio; distributed by University of Washington Press, Seattle.

Online Guide to the Birds of Washington State. Web. 2005. Seattle Audubon Society.

Paulson, D. 1993. Shorebirds of the Pacific Northwest. University of Washington Press, Seattle and London, and Seattle Audubon Society, Seattle.

Smith, M.R., P.W. Mattocks, Jr., and K.M. Cassidy. 1997. Breeding Birds of Washington State: Location Data and Predicted Distributions. Volume 4 in Washington State Gap Analysis—Final Report (K.M. Cassidy, C.E. Grue, M.R. Smith, and K.M. Dvornic, eds.). Seattle Audubon Society, Seattle.

Stepniewski, A. 1999. The Birds of Yakima County, Washington. Distributed by Yakima Valley Audubon Society, Yakima.

Stepniewski, A. 2011. “The ’Meadows Area’ of the Northeastern Cascades.” WOS News (Issue 135, Oct-Nov 2011):1. Washington Ornithology Society bimonthly newsletter, Seattle.

Swan, Ed. 2014 The Birds of Vashon Island A Natural History of Habitat and Population Transformation. (2nd ed.). The Swan Company, Vashon, Washington.

Wahl, T.R. 1995. Birds of Whatcom County Status and Distribution. T.R. Wahl, Bellingham.

Wahl, T.R., B. Tweit, and S.G. Mlodinow (eds.). 2005. Birds of Washington Status and Distribution. Oregon State University Press, Corvallis.

Washington Bird Records Committee. “Sixth Report.” Mlodinow, S. and Aanerud, K. (2002), Washington Birds 8:1-18. “Seventh Report.” Mlodinow, S. and Aanerud, K. (2008), Washington Birds 10:21-47. “Eighth Report.” Aanerud, K. (2011) Washington Birds 11:35-55. Reports are available at

Washington Birder. County Checklist. 2015. Web.

Washington Department of Fish and Wildlife. “Pygmy Rabbits in Washington.” Conservation Program. August 2013. Web. Dec 17, 2014.

Washington Department of Natural Resources. 2003. State of Washington Natural Heritage Plan. Washington State Department of Natural Resources, Olympia.

Zalesky, P.H. 2001. Birding in Snohomish County. rev. ed. Pilchuck Audubon Society, Everett.