That Glasgow diet

I was taking the Dog for its walk this morning when I was joined by Another Walker.
We were remarking that there was a dearth of ducklings and the cygnets had not yet made their appearance.
A little girl and her mum were throwing stale bread in the general vicinity of ducks, gulls, pigeons, coots and one swan. There are signs all over the place saying please don't do this, but I guess they were exercising their democratic right to do what they like.
As we watched, the Other Walker turned to me and said. " Those are definitely Glasgow swans"
To be fair I'd never thought of them as anything else, but he went on. " I feed them chips sometimes. They really like the soggy ones."