Here are a few additional records I can add:
1 flew over residential Kent 20 September 2004 (Linda Bartlett)
On 30 Sept 2004 "about 30" were migrating over Hunts Point (Bellevue),
reported by Stuart Wechsler, and 26 were high over Milton (Pierce/King
County line) later that same day by Roger Orness, possibly the same flock!
1 was seen by the Kent Ponds census team 13 October 2002, and perhaps the
same one was over Boeing Ponds 19 Oct 2002.
Cheers
Charlie Wright
Bonney Lake, Washington