Superregnum: Eukaryota
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Cladus: Craniata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Superclassis: Tetrapoda
Cladus: Reptiliomorpha
Cladus: Amniota
Classis: Reptilia
Cladus: Eureptilia
Cladus: Romeriida
Subclassis: Diapsida
Cladus: Sauria
Infraclassis: Archosauromorpha
Cladus: Crurotarsi
Divisio: Archosauria
Subsectio: Ornithodira
Subtaxon: Dinosauromorpha
Cladus: Dinosauria
Ordo: Saurischia
Cladus: Theropoda
Cladus: Neotheropoda
Infraclassis: Aves
Cladus: Euavialae
Cladus: Avebrevicauda
Cladus: Pygostylia
Cladus: Ornithothoraces
Cladus: Euornithes
Cladus: Ornithuromorpha
Cladus: Ornithurae
Cladus: Carinatae
Parvclassis: Neornithes
Cohors: Neognathae
Ordo: Charadriiformes
Subordo: Lari
Familia: Laridae
Subfamilia: Larinae
Genus: Rissa
Species:R. brevirostris - R. tridactyla
Name
Rissa Stephens, 1826
References
General Zoology 13 (1): 180.
Vernacular names
беларуская: Мыеўкі
English: Kittiwake
The kittiwakes (genus Rissa) are two closely related seabird species in the gull family Laridae, the black-legged kittiwake (Rissa tridactyla) and the red-legged kittiwake (Rissa brevirostris). The epithets "black-legged" and "red-legged" are used to distinguish the two species in North America, but in Europe, where Rissa brevirostris is not found, the black-legged kittiwake is often known simply as kittiwake, or more colloquially in some areas as tickleass or tickleace. The name is derived from its call, a shrill 'kittee-wa-aaake, kitte-wa-aaake'.[1] The genus name Rissa is from the Icelandic name Rita for the black-legged kittiwake.[2]
Description
The two species are physically very similar. They have a white head and body, grey back, grey wings tipped solid black and a yellow bill. Black-legged kittiwake adults are somewhat larger (roughly 40 cm or 16 in in length with a wingspan of 90–100 cm or 35–39 in) than red-legged kittiwakes (35–40 cm or 14–16 in in length with a wingspan around 84–90 cm or 33–35 in). Other differences include a shorter bill, larger eyes, a larger, rounder head and darker grey wings in the red-legged kittiwake. While most black-legged kittiwakes do, indeed, have dark-grey legs, some have pinkish-grey to reddish legs, making colouration a somewhat unreliable identifying marker.
In contrast to the dappled chicks of other gull species, kittiwake chicks are downy and white since they are under relatively little threat of predation, as the nests are on extremely steep cliffs. Unlike other gull chicks which wander around as soon as they can walk, kittiwake chicks instinctively sit still in the nest to avoid falling off.[3] Juveniles take three years to reach maturity. When in winter plumage, both birds have a dark grey smudge behind the eye and a grey hind-neck collar. The sexes are visually indistinguishable.
Distribution and habitat
Kittiwakes are coastal breeding birds ranging in the North Pacific, North Atlantic, and Arctic oceans. They form large, dense, noisy colonies during the summer reproductive period, often sharing habitat with murres. They are the only gull species that are exclusively cliff-nesting. A colony of kittiwakes living in Newcastle upon Tyne and Gateshead in the north east of England has made homes on both the Tyne Bridge and Baltic Centre for Contemporary Art. This colony is notable because it is the furthest inland colony of kittiwakes in the world.
Species
| Adult | Chick | Name | Common name | Distribution |
|---|---|---|---|---|
 |
 |
Rissa tridactyla Linnaeus, 1758 | black-legged kittiwake | It is one of the most numerous of seabirds. Breeding colonies can be found in the Pacific from the Kuril Islands, around the coast of the Sea of Okhotsk throughout the Bering Sea and the Aleutian Islands to southeast Alaska,[4] and in the Atlantic from the Gulf of St. Lawrence through Greenland and the coast of Ireland down to Portugal, as well as in the high Arctic islands.[5] In the winter, the range extends further south and out to sea. |
 |
 |
Rissa brevirostris Bruch, 1853 | red-legged kittiwake | Very limited range in the Bering Sea, breeding only on the Pribilof, Bogoslof and Buldir islands in the United States, and the Commander Islands in Russia. On these islands, it shares some of the same cliff habitat as the black-legged kittiwake, though there is some localized segregation between the species on given cliffs. |
References
"Kittiwake". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
Jobling, James A (2010). The Helm Dictionary of Scientific Bird Names. London: Christopher Helm. p. 336. ISBN 978-1-4081-2501-4.
Tinbergen, Niko (1969). Curious Naturalists. Garden City, New York, USA: American Museum of Natural History. p. 301.
(in Russian) Artyukhin Yu.B. and V.N. Burkanov (1999). Sea birds and mammals of the Russian Far East: a Field Guide, Moscow: АSТ Publishing – 215 p.
"U.K. Joint Nature Conservation Committee Report" (PDF). Archived from the original (PDF) on 2011-02-04. Retrieved 2007-12-16.
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