Most of the gulls, especially the larger ones, are omnivorous, eating small mammals, birds, reptiles and amphibians, according to “The Sibley Guide to Bird Life & Behavior.” They eat dead things that wash up on the shore, and also dung, grain and berries, the bird guide says.

What can I feed seagulls?

Dr Kelley said seagull diets include fish and invertebrates but they can also eat household waste and food from landfill sites. She said the study suggested seagulls may associate areas where people are eating with easy meals and were "more likely to approach food that they have seen people drop or put down".

Can seagulls eat anything?

Seagulls usually eat everything you give them, but they seemed to know that I was trying to feed them bird. ... Gulls will eat pretty damn near anything, including stuff with feathers. And baloney, come to think of it. They're tough, they're scrappy, they'll chase other birds to steal whatever those birds are eating.