Ian and Tweeters,
There is one previous record of a cape may warbler from Washington, from
Bellingham in September 1974. I got this information from Seattle Audubon
Society's BirdWeb. There is a section on rarities, which I believe is
current through the most recent WBRC report (which is the 5th report,
published in the latest Washington Birds.) For those of you who haven't
looked at BirdWeb, it's a great resource. Check it out at:
http://www.birdweb.org/

Mike Donahue
Seattle