Foxes
Foxes are well-known carnivores that feed on a variety of birds and other animals. Foxes, however, like to be close to metropolitan areas since they have better access to food sources there. The gulls, on the other hand, are water birds that are seldom found close to populated areas. How can foxes feed on seagulls, you ask?
Well, in nature, foxes and seagulls seldom come into contact. But if they do, it seems quite clear who would prevail between the two. Foxes may even try to attack gulls that are roosting in a group because they have a more powerful killing mechanism and can quickly take down a number of seagulls.
Foxes prefer to have an abundance of food, so they go hunting more frequently. Foxes pose a risk to the gulls notwithstanding their rarity. On the other hand, before the foxes arrived, our feathery allies had figured out how to fight them. A bunch of seagulls' instinct urges them to be wary whenever they detect cartilage from their own species laying around. They thus take the appropriate steps to protect themselves.
After learning about the two main terrestrial predators of seagulls, foxes and weasels, let's move on to the water animals that pose a threat to the birds.