It has the size of a black-headed gull; however, it has a thicker body. Its head is black and goes down to the neck during reproduction. Its beak is thick. its beak and legs are red. Its wings are white like an egret, and its wing covers are whitish grey. In winter wear, black ear covers look more like a mask than a speck. The back of the young is brown, with a grey panel in the middle of his wing. In the first winter, its back turns grey and his face mask appears, similar to the young of a small Caspian gull, separated from it by his face mask and more prominent wing panel. In the second year, it is similar to the adult and its wing tip is black. It lives in sea shores, river mouths, harbours, marshes, lakes, pastures. It lives on the entire Mediterranean and Black Sea coasts and the western European shores of the Atlantic Ocean. The Mediterranean gull lived Black Sea, South Russia, Turkey and Greece until 1940. However, its population increased after 1940 and distributed to Western Europe.