Also, they have a black terminal tail band. The species is sexually monomorphic. This species also feeds on fish and grains, although to a lesser extent. This species forages by swimming and snatching food from the water surface, or by submerging its head under the water surface. They also forage along coastal areas.
Adults have more efficient foraging skills than do immature birds.
Due to this inefficiency, immature birds feed in areas separate from the adult sites. Immature birds also display greater aggression, often winning fights over food. Interestingly, they are also more brazen in approaching humans, thus gaining a better chance to secure food. The gulls are also kleptoparasitic on occasion, meaning that they steal food that has already been caught by a member of the same or different species. In this arrangement, the gulls help protect the terns by driving out both avian and ground predators.