My husband and I and several bicycling friends saw a pair of Bar-
headed geese in a large flock of Canada geese, grazing on the
lawns near the west parking lot near the main entrance to Marymoor
Park (King County), Redmond, WA. on November 27, 1991. They
probably were escapes from someone's collection, but still
interesting to observe in the wild. I looked for them every time
I returned to Marymoor Park, but they have never reappeared.