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Everything about Seagulls totally explainedGulls (often informally Seagulls) are birds in the family Laridae. They are most closely related to the terns (family Sternidae) and only distantly related to auks, and skimmers, and more distantly to the waders. Most gulls belong to the large genus Larus.
They are typically medium to large birds, usually grey or white, often with black markings on the head or wings. They have stout, longish bills, and webbed feet. Gull species range in size from the Little Gull, at 120 g (4.2 oz) and 29 cm (11.5 inches), to the Great Black-backed Gull, at 1.75 kg (3.8 lbs) and 76 cm (30 inches).
Most gulls, particularly Larus species, are ground nesting carnivores, which will take live food or scavenge opportunistically. The live food often includes crabs and small fish. 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.
Gulls — the larger species in particular — are resourceful and highly-intelligent birds, demonstrating complex methods of communication and a highly-developed social structure; for example, many gull colonies display mobbing behaviour, attacking and harassing would-be predators and other intruders. In addition, certain species (for example the Herring Gull) have exhibited tool use behaviour. Many species of gull have learned to co-exist successfully with humans and have thrived in human habitats. Others rely on kleptoparasitism to get their food.
Two terms are in common usage among gull enthusiasts for subgroupings of the gulls:
Hybridisation between species of gull occurs quite frequently, although to varying degrees depending on the species involved (see Hybridisation in gulls). The taxonomy of the large white-headed gulls is particularly complicated.
In common usage, members of various gull species are often referred to as sea gulls or seagulls. This name is used by the layman to refer to a common local species or all gulls in general, and has no fixed taxonomic meaning.
The American Ornithologists' Union combines Sternidae, Stercorariidae, and Rhynchopidae as subfamilies in the family Laridae, but recent research indicates that this is incorrect.
List of gulls in taxonomic order
Genus Larus
Dolphin Gull, Larus scoresbii
Pacific Gull, Larus pacificus
Belcher's Gull, Larus belcheri
Olrog's Gull, Larus atlanticus
Black-tailed Gull, Larus crassirostris
Grey Gull, Larus modestus
Heermann's Gull, Larus heermanni
White-eyed Gull, Larus leucophthalmus
Sooty Gull, Larus hemprichii
Common Gull or Mew Gull, Larus canus
Audouin's Gull, Larus audouinii
Ring-billed Gull, Larus delawarensis
California Gull, Larus californicus
Great Black-backed Gull, Larus marinus
Kelp Gull, Larus dominicanus (called "Southern Black-backed Gull" or "Karoro" in New Zealand)
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
Heuglin's Gull, Larus heuglini
American Herring Gull, Larus smithsonianus
Yellow-legged Gull, Larus michahellis
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
Genus Rissa
Black-legged Kittiwake, Rissa tridactyla
Red-legged Kittiwake, Rissa brevirostris
Genus Pagophila
Ivory Gull, Pagophila eburnea
Genus Rhodostethia
Ross's Gull, Rhodostethia rosea
Genus Xema
Sabine's Gull, Xema sabini
Genus Creagrus
Swallow-tailed Gull, Creagrus furcatus
The Laridae are known from fossil evidence since the Early Oligocene, some 30-33 mya. A fossil gull from the Middle to Late Miocene of Cherry County, USA is placed in the prehistoric genus Gaviota; apart from this and the undescribed Early Oligocene fossil, all prehistoric species were tentatively assigned to the modern genus Larus. Among those of them that have been confirmed as gulls, "Larus" elegans and "L." totanoides from the Late Oligocene/Early Miocene of SE France have since been separated in Laricola.
Gallery
Image:Seagull dropping clam.jpg|Seagull dropping clam.
Image:Flock of gulls - various species.jpg|An assorted flock of Gulls
Image:Goeland adulte et juvénile.jpg|Lesser Black-backed Gull - Adult gull and her chick
Image:Gull ca usa.jpg|Western Gull in Monterey, United States
Image:Baby_gull.jpg|Gull chick at Trondheim, Norway
Image:Larus ridibundus.jpg|A Black-headed Gull in Devon, England
Image:Creagrus furcatus.JPG|The Swallow-tailed Gull, endemic inhabitant of the Galápagos Islands.
Image:Creagrus furcatus flight.jpg|Swallow-tailed Gull in flight, showing wing patterns.
Image:herring.gull.northdevon.arp.750pix.jpg|Herring Gull on the North Devon coast, England
Image:Seagull on sale pier.jpg|Silver Gull at Sale, Australia
Image:Chesapeake Bay gulls soaring.jpg|Ring-billed Gulls at Chesapeake Bay
Image:Larus-delawarensis-021.jpg|Ring-billed Gull at Toronto, Ontario, Canada
Image:peserina2.jpg|Dolphin Gull at Ushuaia, Tierra del Fuego
Image:Seagull_lakes_entrance.jpg|A Silver Gull, Lakes Entrance
Image:Gulls in air13.jpg|Black-tailed Gulls feeding in flight
Image:Heermann's Gull breeding adult.jpg|Heermann's Gulls have all over greyish plumage with a white head during the breeding season.
Image:Lava gull.jpg|Lava Gull at Santa Cruz Island, Galapagos
Image:Oeufs goeland argenté.jpg|Herring Gull eggs
Image:Larus smithsonianus-USFWS.jpg|American Herring Gull on its nest
Image:Seagull_1.jpg
Image:Seagull_3.jpg
Further Information
Get more info on 'Seagulls'.
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