Seagulls have worked out school break times to nab food from children.
Seagull
A study by the University of Bristol found that the birds foraged when pupils at a school in the city had their lunch after strapping GPS-enabled backpacks to the gulls.
Dr. Anouk Spelt, lead author of the research, said: "Our first day at the school, the students were excited to tell us about the gulls visiting their school at lunchtime.
"Indeed, our data showed that gulls were not only present in high numbers during lunchtime to feed on leftovers, but also just before the start of the school and during the first break when students had their snack."
Seagulls were also observed in a public park and a waste centre in Bristol - where it was found that the birds were more likely to appear when food waste was being unloaded.