Your Red-breasted Merganser records this year, and I think I recall in previous years too, certainly do suggest this species continues to winter within our region in the geographical sense, but in seems not in the political sense - does anybody look for them off Lau Fau Shan or points north or south along that coast? They were once quite regularly seen there, in flocks of up to 100, I seem to recall.
Mike Turnbull