Toxostoma
Black-legged Kitiwake
Ivory Gull
Bonaparte's Gull
Black-headed Gull
Ross's Gull
Laughing Gull
Franklin's Gull
Heermann's Gull
Mew Gull
Ring-billed Gull
Western Gull
Yellow-footed Gull
California Gull
Herring (Smithsonian) Gull
Herring (Vega) Gull
Thayer's Gull
Iceland Gull
Lesser Black-backed Gull
Slaty-backed Gull
Glaucous-winged Gull
Glaucous Gull
