Washington Breeding Bird Atlas
- Maps for all species found during 1987-1995 survey.
- http://depts.washington.edu/natmap/

Audubon Washington
- Includes conservation, action, birds, state chapters, volunteer opportunities, news, publications, and upcoming events.
- http://wa.audubon.org/

Washington Ornithological Society
- Meetings, field trips, checklists, publications, photo gallery, rare bird alert, and sightings requests.
- http://www.wos.org/

Mammals of Washington
- Information on 34 species, with photos and range maps.
- http://www.boyds.org/paws/

Washington Hotspots
- Local events, tours, rare bird alerts, print resources, and a map of birding hotspots.
- http://www.camacdonald.com/birding/uswashington.htm

Oregon-Washington Partners in Flight
- Bird conservation plans, reports, and newsletters.
- http://www.orwapif.org/

Falcon Research Group
- A non-profit organization dedicated to the support of field research, public education and the conservation of birds of prey.
- http://www.frg.org/

BirdWeb
- Seattle Audubon's Online Guide to the Birds of Washington State.
- http://www.birdweb.org/birdweb/