Gulling the Gulls?

The description of Herring gulls as a 'seagull' is a bit of a misnomer as these birds are essentially opportunistic agents in a variety of locations (not always by the sea). The prediction that they might well decline in our cities with improvements in our treatment of human waste is, I feel, a tad optimistic (https://www.theguardian.com/environment/2018/nov/16/gulls-gulls-gulls-how-the-seaside-birds-took-over-urban-britain). Many of our high-rise buildings seem to have characteristics of the elevated, predator free nesting locations that these birds favour and edible rubbish still exists outside treatment areas. I predict that they will still thrive in our cities.