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Most gulls belong to the large genus Larus.

They are in general medium to large birds, typically grey or white, often with black markings on the head or wings. They have stout, longish bills and webbed feet.

Most gulls, particularly Larus species, are ground nesting omnivores, which will take live food or scavenge opportunistically.

Apart from the kittiwakes, gulls are typically coastal or inland species, rarely venturing far out to sea. The large species take up to four years to attain full adult plumage, but two years is typical for small gulls. The taxonomy of the Herring Gull is particularly complicated. The species are:

• Charadriiformes
• Suborder Charadrii: The waders.
• Suborder LariLari : Eukaryota : Animalia : Metazoa : Chordata : Aves : Charadriiformes Lari Family (biology)Families Stercorariidae Rhynchopidae Laridae Sternidae The suborder Lari is the part of the order Charadriiformes which includes the gulls, terns, skuas and ski
  • Family: Laridae
    • Dolphin Gull Larus scoresbii
    • Pacific GullPacific Gull : Animalia : Chordata : Aves : Charadriiformes : Laridae Larus pacificus Binomial name Larus pacificus Latham, 1802 The Pacific Gull Larus pacificus is a very large gull native to the southern coasts of Australia and the nearby islands. It is Larus pacificus
    • Belcher's Gull Larus belcheri
    • Olrog's Gull Larus atlanticus
    • Black-tailed Gull Larus crassirostris
    • Grey Gull Larus modestus
    • Heermann's GullHeermann' Gull Subadult Heermann's Gull : Animalia : Chordata : Aves : Charadriiformes : Laridae Larus heermanni Binomial name ''Larus heermanni Cassin, 1852 The Heermann's Gull ''Larus heermanni is a gull resident in the United States and Mexico. Of the Larus heermanni
    • White-eyed Gull Larus leucophthalmus
    • Sooty Gull Larus hemprichii
    • Common GullThe Common Gull Larus canus is a medium-sized gull which breeds across North America (where it is called Mew Gull , Europe and Asia. It migrates further south in winter. There are a two distinct populations in North America. The shorter-billed American ra or Mew Gull Larus canus
    • Audouin's GullAudouin's Gull : Animalia : Chordata : Aves : Charadriiformes : Laridae Larus audouinii Binomial name Larus audouinii Payraudeau, 1826 The Audouin's Gull Larus audouinii is a large gull restricted to the Mediterranean and the western coast of Saharan Afri Larus audouinii
    • Ring-billed GullRing-billed Gull : Animalia : Chordata : Aves : Charadriiformes : Laridae : Larus delawarensis Binomial name ''Larus delawarensis Ord, 1815 The Ring-billed Gull Larus delawarensis is a medium-sized gull. Adults are 49cm length and with a 124cm wingspan. Larus delawarensis
    • California GullCalifornia Gull Scientific Classification : Animalia : Chordata : Aves : Charadriiformes : Laridae Larus californicus Binomial name ''Larus californicus Lawrence, 1854) The California Gull Larus californicus is a medium-sized gull, smaller than the Herrin Larus californicus
    • Great Black-backed Gull Larus marinus
    • Kelp Gull Larus dominicanus
    • Glaucous-winged Gull Larus glaucescens
    • Western Gull Larus occidentalis
    • Yellow-footed Gull Larus livens
    • Glaucous Gull Larus hyperboreus
    • Iceland Gull Larus glaucoides
    • Thayer's Gull Larus thayeri
    • Herring Gull Larus argentatus
    • American Herring Gull Larus smithsonianus
    • Yellow-legged Gull Larus michahelis
    • Caspian Gull Larus cachinnans
    • East Siberian Herring Gull Larus vegae
    • Armenian Gull Larus armenicus
    • Slaty-backed Gull Larus schistisagus
    • Lesser Black-backed Gull Larus fuscus
    • Great Black-headed Gull Larus ichthyaetus
    • Brown-headed Gull Larus brunnicephalus
    • Grey-headed Gull Larus cirrocephalus
    • Hartlaub's Gull Larus hartlaubii
    • Silver Gull Larus novaehollandiae
    • Red-billed Gull Larus scopulinus
    • Black-billed Gull Larus bulleri
    • Brown-hooded Gull Larus maculipennis
    • Black-headed Gull Larus ridibundus
    • Slender-billed Gull Larus genei
    • Bonaparte's Gull Larus philadelphia
    • Saunders' Gull Larus saundersi
    • Andean Gull Larus serranus
    • Mediterranean Gull Larus melanocephalus
    • Relict Gull Larus relictus
    • Lava Gull Larus fuliginosus
    • Laughing Gull Larus atricilla
    • Franklin's Gull Larus pipixcan
    • Little Gull Larus minutus
    • Kittiwake or Black-legged Kittiwake Rissa tridactyla
    • Red-legged Kittiwake Rissa brevirostris
    • Ivory Gull Pagophila eburnea
    • Ross's Gull Rhodostethia rosea
    • Sabine's Gull Xema sabini
    • Swallow-tailed Gull Creagrus furcatus
  • Family Sternidae: terns
  • Family Stercorariidae: skuas
  • Family Rhynchopidae: skimmers
• Suborder Alcae: auks.