Gulls are plump-bodied with a short thick neck, a stout bill with a long hooked upper beak, a round or squared tail and large webs well adapted for swimming.
它們身體較「豐滿」，頭頸粗短、嘴厚實，上喙較長且呈鉤狀，尾巴為圓形或方形，蹼大、善於游泳。