I learned something new the other day.
We have a bad geese problem on the lake, especially on the waterfront where our pier and boats are. Goose crap where people walk in the grass and on the piers. We have put out strobe lights to keep them from nesting at night but that didn't deter them during the day. A few weeks ago a pair of white swans moved in and the geese slowly left. I haven't seen a goose in about a week.
From what I have learned, Swans don't like geese, will attack them and even try to drown geese.
I like swans all of sudden.