Many different gull species frequent Iceland. The kittywake is the only cliff breeder. All others breed in colonies on lowland coastal regions and marshes. It is a specie that is a very common bird throughout Europe and is extremely adaptable. Thus it can also make use of wastes from human settlements.
Gulls generally are adaptable birds.
There is one special feature about the gulls on Iceland. This concerns the hybridization of the Herring Gull and the Glaucous Gull. The Herring Gull only settled in the early part of the 20th century. Pure Glaucous Gulls are becoming rarer. Other gulls are non-breeders on Iceland but are winter guests.