Uria

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Uria
Temporal range: Late Miocene–present
ThickbilledMurre23.jpg
Common murre between two thick-billed murres
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Charadriiformes
Family: Alcidae
Genus: Uria
Brisson, 1760
Type species
Colymbus aalge
Species

Uria aalge
Uria lomvia

Uria is a genus of seabirds in the auk family known in Europe as guillemots , in most of North America as murres, and in Newfoundland and Labrador as turr. These are medium-sized birds with mainly brown or black plumage in the breeding season. They breed on the coasts of the northern Atlantic and Pacific oceans.

Contents

Taxonomy

The genus Uria was introduced by the French zoologist Mathurin Jacques Brisson in 1760 with the common murre (Uria aalge) as the type species. [1] [2] The genus name is from Ancient Greek ouria, a waterbird mentioned by Athenaeus. [3] The English "guillemot" is from French guillemot probably derived from Guillaume, "William". [4] "Murre" is of uncertain origins, but may imitate the call of the common guillemot. [5]

Uria auks are relatives of the razorbill, little auk and the extinct great auk and together make up the tribe Alcini. Despite the similar British common names, they are not so closely related to the Cepphus guillemots, which form the tribe Cepphini.

Extant species

The genus contains two species: [6]

Genus Uria Brisson, 1760 – two species
Common nameScientific name and subspeciesRangeSize and ecologyIUCN status and estimated population
Common murre or common guillemot

Common Murre RWD2.jpg

Uria aalge
(Linnaeus, 1758)

Seven subspecies
  • U. a. aalge
  • U. a. albionis
  • U. a. hyperborea
  • U. a. intermedia
  • U. a. spiloptera
  • U. a. inornata
  • U. a. californica'
North Pacific, Japan, Eastern Russia, Alaska, California, Oregon, Washington, British Columbia, Canada, Greenland, Iceland, northern Ireland and Britain, southern Norway, possibly New England
Fratercula arctica distribution map.svg
Size:

Habitat:

Diet:
 LC 


Thick-billed murre or Brünnich's guillemot

Uria lomvia5.jpg

Uria lomvia
(Linnaeus, 1758)

Four subspecies
  • U. l. lomvia(Linnaeus, 1758)
  • U. l. eleonorae(Portenko, 1937)
  • U. l. heckeri(Portenko, 1944)
  • U. l. arra(Pallas, 1811)
Northern Hemisphere
Uria lomvia map.svg
Size:

Habitat:

Diet:
 LC 


Fossils

Uria brodkorbi, a fossil murre from the Monterey Formation of southern California Bulletin (1971-) (19800542534).jpg
Uria brodkorbi , a fossil murre from the Monterey Formation of southern California

Some prehistoric Uria species are also known:

Uria brodkorbi is interesting insofar as it is the only known occurrence of the Alcini tribe in the temperate to subtropical Pacific, except for the very fringe of the range of U. aalge. It suggests that the Uria species, which are the sister taxon to all the other Alcini, and like them are usually believed to have evolved in the Atlantic, may have evolved in the Caribbean or possibly close to the Isthmus of Panama. The modern Pacific distribution would then be part of a later arctic expansion, whereas most other auk lineages form clades with a continuous range in the Pacific, from arctic to subtropical waters.

Description

These birds breed in large colonies on coastal cliffs, laying single elongated conical eggs directly on cliff ledges. They move south in winter to keep in ice-free waters.

They dive for food from the surface, swimming underwater and being among the deepest divers of all birds, using their stubby wings to routinely dive to more than 100 meters, and feeding on fish and crustaceans, also some molluscs, insects and plant material. [7]

Adult birds are black or brown on the head, neck, back and wings with white underparts. The bill is long and pointed. They have a small rounded black tail. The lower face becomes white in winter.

The flight is strong and direct, and these species have fast wing beats due to the short wings.

Uria guillemots produce a variety of harsh cackling calls at the breeding colonies, but are silent at sea.

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<span class="mw-page-title-main">Auk</span> Family of birds

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<span class="mw-page-title-main">Little auk</span> Species of bird

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Cepphus is a genus of seabirds in the auk family also referred to as true guillemots or, in North America, simply as guillemots. The genus name Cepphus is from Ancient Greek κέπφος kepphos, a pale waterbird mentioned by Greek authors including Aristotle. The English word "guillemot" is from French guillemot probably derived from Guillaume, "William". "Murre" is of uncertain origins but may imitate the call of the common guillemot.

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Timothy Robert Birkhead is a British ornithologist. He has been Professor of Behaviour and Evolution at the University of Sheffield since 1976.

References

  1. Brisson, Mathurin Jacques (1760). Ornithologie, ou, Méthode Contenant la Division des Oiseaux en Ordres, Sections, Genres, Especes & leurs Variétés (in French and Latin). Paris: Jean-Baptiste Bauche. Vol. 1, p. 52, Vol. 6, p. 70.
  2. Peters, James Lee, ed. (1934). Check-list of Birds of the World. Vol. 2. Cambridge, Massachusetts: Harvard University Press. p. 352.
  3. Jobling, James A (2010). The Helm Dictionary of Scientific Bird Names. London: Christopher Helm. p. 396. ISBN   978-1-4081-2501-4.
  4. "Guillemot" . Oxford English Dictionary (Online ed.). Oxford University Press.(Subscription or participating institution membership required.)
  5. "Murre" . Oxford English Dictionary (Online ed.). Oxford University Press.(Subscription or participating institution membership required.)
  6. Gill, Frank; Donsker, David, eds. (2019). "Noddies, gulls, terns, auks". World Bird List Version 9.2. International Ornithologists' Union. Retrieved 24 June 2019.
  7. National Geographic Society. "Thick-Billed Murres, Thick-Billed Murre Pictures, Thick-Billed Murre Facts - National Geographic". Archived from the original on January 21, 2010.