| Ostriches | | Rheas | | Kiwis | | Cassowaries | | Tinamous | | Waterfowl | | Landfowl | | Nightjars | | Oilbird | | Frogmouths | | Owlet-nightjars | | Treeswifts, Swifts, Hummingbirds | | Turacos | | Bustards | | Cuckoos | | Mesites | | Sandgrouse | | Doves, Pigeons | | Cranes, Rails & relatives | | Grebes | | Flamingos | | Shorebirds | | | Buttonquails | | | Thick-knees | | | Sheathbills | | | Oystercatchers | | | Avocets, Stilts | | | Plovers, Dotterels, Lapwings | | | Tundra Plovers | | | Egyptian Plover | | | Painted Snipes | | | Jacanas | | | Plains-wanderer | | | Seedsnipes | | | Sandpipers, Snipes | | | Pratincoles, Coursers | | | Gulls | | | Terns | | | Noddies | | | Skuas | | | Auks | | Sunbittern, Kagu | | Loons | | Penguins | | Tubenoses | | Storks | | Gannets, Cormorants & relatives | | Pelicans, Ibises, Herons & relatives | | Hoatzin | | Birds of Prey | | Owls | | Mousebirds | | Cuckoo roller | | Trogons | | Hornbills, Hoopoes, Wood hoopoes | | Rollers, Kingfishers, Bee-eaters & relatives | | Woodpeckers and Relatives | | Seriemas | | Falcons, Caracaras | | Parrots | | Perching birds (Songbirds) |
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| African grey-headed gull EU | American herring gull
(Smithsonian gull) NA | | Andean gull SA | | Armenian gull AS | | Atlantic kittiwake | | Audouin's gull EU | Belcher`s gull
(Band-tailed gull) | | Black-billed gull | Black-headed gull
(Common black-headed gull) EU ,nEU,AS | Black-legged kittiwake
(No Subspecific status) NA | | Black-tailed gull EU ,nEU,AS | | Bonaparte\'s gull NA | Brown-headed gull
(Indian Black-headed gull) | | Caspian gull EU ,nEU | Dolphin gull
(Scoresby`s gull)
(Magellan gull) | | European herring gull EU ,nEU | | Franklin`s gull NA | | Glaucous gull | | Glaucous gull | | Great black-backed gull EU ,nEU,NA | | Grey gull EU ,NA,SA | Grey-headed gull
(Grey-hooded gull)
(No Subspecific status) | Heermann's gull
(Western gull) | | Heuglin's gull | | Ivory gull | | Kelp gull SA,NA,AU | | Laughing gull EU ,SA,NA | Lesser black-backed gull
(Hering gull)
(No Subspecific status) EU ,AS | | Little gull | | Mediterranean gull EU | Mew gull
(Common gull) AS,nEU,EU | Pacific gull
(Large-billed gull)
(Australian gull) | | Pacific kittiwake EU | Pallas's gull
(Great black-headed gull) AS | | Red-legged kittiwake EU ,NA | | Ring-billed Gull NA | | Ross's gull | | Sabine's gull | Saunders's Gull
(Chinese black-headed gull) AS | Silver gull
(Red-billed gull) AU,AS,NA | | Slaty-backed gull AS | | Slender-billed gull EU | Sooty gull
(Hemprich`s gull) AS | | South American grey-headed gull | | Western gull NA | | Western lesser black-backed gull | White-eyed gull
(Red Sea black-headed gull) AS | Yellow-legged gull
(Western yellow-legged herring gull) EU ,AS,nEU | |
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Slaty-backed gull
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Larus schistisagus
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STEJNEGER, 1884 |
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| | Number of Subspecies: | 00 | | Information Source for Taxonomy: | del Hoyo & Collar (2014) Illustrated Checklist of the Birds ot the World, Vol. 1, Non-passerines
| | Body length: | 55 - 68 cm | | Wingspan: | 132 - 150 cm | | Weight: | 1050 - 1695 g | | IUCN status: | LC (Least Concern)
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