Gulls also called Seagulls (sci. Laridae) are family coastal birds (sea, lake, river), medium to large size, often with black spots on the head or wings.
Depending on the type, the size of gulls ranges from the minimum which weighs 120 g / 29 cm long, up to 1.75 kg / 76 cm long gulls. The larger species need approximately 4 years to mature and have feathers of adults, and the smaller need 2 years.
On their legs they have three fingers forward related to swimming rind (skin) and one finger, almost entirely stunted, turned backwards.
Most gulls live in temperate and cooler parts of both hemispheres. They live on the banks of the seas or lakes, sometimes deeper into the mainland, and rarely engage in flight on the high seas.
Seagulls, especially larger species, are very intelligent birds that use complex communication and have highly developed social structure.
For example, they often gather in groups for defense against predators, and some of them have demonstrated the ability to use primitive tools.
Many types seagulls are successful in coexistence with people.