Originally posted by: destrekor
Originally posted by: Nymphaea
seagulls are known as theifs of food. They stole somebody's burger at the beach when the food was hid well inside the bag. Maybe they know what the big "M" (McDonald) means...
just like the gull in the OP has learned a certain bag for the chips he likes, it's very possible they learn certain cues for possible tasty goods. because, if once they found a bag with a big yellow M with some scraps, after a couple of times they may start to recognize it as a possible food source.
that and smell. many animals have a great sense of smell, and if they smell food from inside a bag, they'll do what it takes to get into it. and like many have noted, gulls are rather bold in their attempts for food.