A Chain Reaction Brought Gulls To The Bay... Now, They Are Eating Other Birds.

But something happened to disrupt that pattern. A few decades ago, humans made changes to one of those island lakes that might have set off a chain reaction causing gulls to nest in the Bay Area. They then end up eating trash at places like Bowers’ transfer station and eating shorebirds, some of which are already on the state’s list of species of special concern.