- Birds of the World for WOS members – WOS members can sign up for free access to Cornell’s Birds of the World website.
- Bird Web – Seattle Audubon’s Guide to the Birds of Washington State
- Birder’s Dashboard for Washington – desktop – Recent eBird sightings (desktop)
- Birder’s Dashboard for Washington – mobile – Recent eBird sightings (mobile)
- A Birder’s Guide to Washington – 613-page site guide now online
- Seasonal Occurrence Charts – Charts based on Washington seasonal bar graphs
- Printable Official State Checklist – WBRC’s Updated Official State Checklist
- WhatsApp Birding Groups in Washington State – Join a WhatsApp group — statewide or for a town or county you’re interested in
- Four-letter Alpha Codes for Bird Names – What is RBSA? This website will translate that for you
- eBird Northwest Portal – Northwest-specific articles and content
- Traveling in Washington? – Resources for birding in Washington State
- Washington Birder – Information and checklists for Washington State by county.
- USA county checklists – Get a printable checklist for any county in any US state
- Pelagic Birding – Home page for Westport Seabirds
- Tweeters Mailing List on the Web – Latest Tweeters messages
- Tweeters Archives 1994 – 2023 – Search or browse more than 25 years of Tweeters messages
- Maps of Washington State Birding Sites – Maps of Washington State Birding Sites
- Bird Note – Brief vivid audio stories about birds that are aired daily on public radio and can be found online.
- Birding ListServs – Birding ListServs
- xeno-canto – Draw a box around the Pacific Northwest to listen to song recordings for species in this region.
- List of national wildlife refuges in Washington State – Links to all national wildlife refuges in Washington State.
- Birding Festivals in Washington State – In addition, check the WOS calendar for festival listings.
- American Birding Association Code of Birding Ethics – Adopted by WOS Board
- Oregon Birding Locations – East Cascades Audubon Society Guide
- WOS’s Birding Facebook Group – A friendly place to discuss bird IDs and other Washington State birding topics with others.
- WOS’s You Tube Channel – See video of WOS monthly meeting presentations
- Guide to Window Collision Prevention – Downloadable .pdf with information and recommendations
- Website of the Urban Raptor Conservancy – Falcons, hawks, eagles, and owls found in the Northwest’s urban areas, especially Seattle
- Resources For Adding Native Plants To Your Garden – Websites, printed publications and tips for adding native plants to your garden and to help birds.