Several office parks in the Hillsboro area have nice open spaces that attract birds. AmberGlen has a pond next to a large lawn which attracts good numbers of gulls in winter.
Here is a male Eurasian Wigeon, with an American Wigeon in the background. I am guessing this is a young bird molting into his first adult plumage. It seems a little late in the season to me, but I don’t know whether this Asian species has a different molt schedule from his North American counterpart.