Gulls phylogeny Little gull Black-Legged kittiwake Slender-billed Gull Bonaparte's Gull Black-Headed gull Brown-headed gull Gray-hooded gull Silver gull Grey gull Laughing gull Pallas's gull Mediterranean gull Audouin’s gull Heermann's gull Pacific gull Common gull Ring-Billed gull Great black-backed European herring gull Yellow-Legged gull Caspian gull Lesser black-backed gull Mongolian gull Larus phylogeny Heermann's gull Pacific gull Black-tailed gull Common gull Great black-backed European herring gull Yellow-Legged gull Caspian gull Lesser black-backed gull East Siberian gull Mongolian gull