It is likely that Manx Shearwater is breeding in Washington State. I still
remember Richard Rowlett's posting to Tweeters from 2008 as if it was yesterday.
http://mailman1.u.washington.edu/mailman/htdig/tweeters/2008-June/064420.html
There have been many summer sightings near Destruction Island (off Ruby Beach
south of Folks) since, so it is highly probable that they are breeding there. I
can't say I remember whether a nest was actually ever found though.
Stefan Schlick
Hillsboro, OR
<http://mailman1.u.washington.edu/mailman/htdig/tweeters/2008-June/064420.html>