This afternoon around 4:00 pm a flock of 100 Canadas & 50 Cackling Geese flew into the Walker Pit; with them came one White-fronted Goose. It swam with about 20 Canadas and even moved fairly close to the viewing area for the Pit.
At about 4:40 pm when Urling went to find it , all but 20 geese had left -- but the White-fronted remained -- with the 20.
It might spend the night and present itself tomorrow morning before the geese go out to feed. Walker has had roughly 1000 geese for the past week or so, most of them Cackling as far as we can tell.