helen briggs reports.en them eat, sort of, octopus, also invasive parakeets. the natural diet of gulls includes seafood, earthworms and, gruesome as it may sound, other birds. but as food becomes harder to find, more gulls are dining on human leftovers. pop out for lunch in any city centre and it's easy to find an urban gull or two keeping an eye out on whatever you're eating. there are so many gulls in cities, and whether it's our food that's bringing them into town — and you can help by sending in your photos. so we want people to upload photos of gulls eating absolutely anything. it can be chips, it can be pigeons, rats, fish, mouth, upload it to the site — gulls eating stuff. the data will be used to map what gulls are eating population declines. and with many seabirds in big trouble, hit by warming seas, dwindling fish stocks, and the lingering effects of bird flu, the scientists say the study will raise awareness helen briggs, bbc news. coming up in a few minutes' time, — coming up in a few minutes'