#PSA: Don't feed wild animals. PSA 2: Beasts in cities are still wild animals.
Two gulls just flew *at* a little girl on the station to get at her doughnut and then when she had finished screaming, she fed a bit of it to the gull as an offering. They didn't go away, it attracted more of them. They have learned that humans are essentially harmless; quite rightly, no one hits or frightens them, so they come back for more. Don't feed wild animals.