Guillemot

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Common guillemots, one in bridled form (with "spectacles"), and one Brunnich's guillemot (U. lomvia, with white-marked bills) from the genus Uria. Common Guillemots Reykjanes Iceland.jpg
Common guillemots, one in bridled form (with "spectacles"), and one Brünnich's guillemot (U. lomvia, with white-marked bills) from the genus Uria .
Black guillemot (C. grylle) from the genus Cepphus. Tystie1.jpg
Black guillemot (C. grylle) from the genus Cepphus .
Common guillemot in bridled form, a white circle around the eye with an extension backwards suggesting they are wearing spectacles. Common Guillemot in Bridled form.jpg
Common guillemot in bridled form, a white circle around the eye with an extension backwards suggesting they are wearing spectacles.

Guillemot is the common name for several species of seabird in the Alcidae or auk family (part of the order Charadriiformes). In Europe, the term covers two genera: Uria and Cepphus . In North America the Uria species are called murres and only the Cepphus species are called "guillemots". This word of French origin derives from a form of the name William, cf. French : Guillaume. [1]

Contents

The two living species of Uria, together with the razorbill, dovekie, and the extinct great auk, make up the tribe Alcini. They have distinctly white bellies, thicker and longer bills than Cepphus, and form very dense colonies on cliffs during the reproductive season. Guillemot eggs are large (around 11% of female weight [2] ), pyriform in shape, and colourful, making them attractive targets for egg collectors. [3]

The three living species of Cepphus form a tribe of their own: Cepphini. They are smaller than the Uria species and have black bellies, rounder heads and bright red feet.

Systematics

Uria

Some prehistoric species are also known:

Uria brodkorbi 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.

Cepphus

As in other genera of auks, fossils of prehistoric forms of Cepphus have been found:

The latter two resemble the extant species, but because of the considerable distance in time or space from their current occurrence, they may represent distinct species.

Pyriform egg

Guillemots lay a single pyriform (pear-shaped) egg directly on a cliff edge in dense breeding colonies; they do not build a nest, allowing them to nest close to one another even on uneven cliff edges, the density protecting their eggs and chicks from predatory gulls. While the egg would seem vulnerable to rolling off the edge, this does not usually happen. [4] It has been suggested that the egg might simply spin if disturbed, or roll in an arc preventing it from falling over the cliff edge. [5] There is no evidence for either explanation. However, a pyriform egg placed experimentally on a steep slope did not roll, while a less pointed and more ellipsoidal egg did. [6] Ornithologist Tim Birkhead experimented, and found that the arc that a pyriform egg rolls in is wider than most cliff ledges, so not protective against falls. He attributed the egg's stability to its long straight edge resting on the ground, creating more friction and making it less likely to move and fall. [4]

Guillemot eggs were collected until the late 1920s in Scotland's St Kilda islands by their men scaling the cliffs. The eggs were buried in St Kilda peat ash to be eaten through the cold, northern winters. The eggs were considered to be similar to duck eggs in taste and nutrition. [7]

Bounciness in chicks

Guillemot chicks are born on rocky cliffs near the seaside. They leave the nest by jumping off the cliffsides before their wings are strong enough to allow them to fly, so they parachute down toward the ground as opposed to flying. Their dense, downy feathers and underdeveloped wings allow them to avoid serious harm when falling to the ground, so they bounce around slightly after hitting the ground. [8]

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

An auk or alcid is a bird of the family Alcidae in the order Charadriiformes. The alcid family includes the murres, guillemots, auklets, puffins, and murrelets. The family contains 25 extant or recently extinct species that are divided into 11 genera.

<span class="mw-page-title-main">Common gallinule</span> Species of bird

The common gallinule is a bird in the family Rallidae. It was split from the common moorhen by the American Ornithologists' Union in July 2011. It lives around well-vegetated marshes, ponds, canals, and other wetlands in the Americas. The species is not found in the polar regions or many tropical rainforests. Elsewhere, the common gallinule is likely the most commonly seen rail species in much of North America, except for the American coot in some regions.

<span class="mw-page-title-main">Black guillemot</span> Species of bird

The black guillemot or tystie is a medium-sized seabird of the Alcidae family, native throughout northern Atlantic coasts and eastern North American coasts. It is resident in much of its range, but large populations from the high arctic migrate southwards in winter. The bird can be seen in and around its breeding habitat of rocky shores, cliffs and islands in single or smalls groups of pairs. They feed mainly by diving towards the sea floor feeding on fish, crustaceans or other benthic invertebrates. They are listed on the IUCN red list as a species of least concern.

<span class="mw-page-title-main">Pigeon guillemot</span> Seabird in the auk family from North Pacific coastal waters

The pigeon guillemot is a species of bird in the auk family, Alcidae. One of three species in the genus Cepphus, it is most closely related to the spectacled guillemot. There are five subspecies of the pigeon guillemot; all subspecies, when in breeding plumage, are dark brown with a black iridescent sheen and a distinctive wing patch broken by a brown-black wedge. Its non-breeding plumage has mottled grey and black upperparts and white underparts. The long bill is black, as are the claws. The legs, feet, and inside of the mouth are red. It closely resembles the black guillemot, which is slightly smaller and lacks the dark wing wedge present in the pigeon guillemot.

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

The razorbill, razor-billed auk, or lesser auk is a North Atlantic colonial seabird and the only extant member of the genus Alca of the family Alcidae, the auks. It is the closest living relative of the extinct great auk.

<span class="mw-page-title-main">Common murre</span> Species of bird

The common murre, also called the common guillemot or foolish guillemot,(Uria aalge) is a large auk. It has a circumpolar distribution, occurring in low-Arctic and boreal waters in the North Atlantic and North Pacific. It spends most of its time at sea, only coming to land to breed on rocky cliff shores or islands.

<span class="mw-page-title-main">Thick-billed murre</span> Species of bird

The thick-billed murre or Brünnich's guillemot is a bird in the auk family (Alcidae). This bird is named after the Danish zoologist Morten Thrane Brünnich. The very deeply black North Pacific subspecies Uria lomvia arra is also called Pallas' murre after its describer. The genus name is from Ancient Greek ouria, a waterbird mentioned by Athenaeus. The species term lomvia is a Swedish word for an auk or diver. The English "guillemot" is from French guillemot probably derived from Guillaume, "William". "Murre" is of uncertain origins, but may imitate the call of the common guillemot.

<i>Cepphus</i> Genus of birds

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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Fowlsheugh is a coastal nature reserve in Kincardineshire, northeast Scotland, known for its 70-metre-high (230 ft) cliff formations and habitat supporting prolific seabird nesting colonies. Designated as a Site of Special Scientific Interest (SSSI) by Scottish Natural Heritage, the property is owned by the Royal Society for the Protection of Birds. Fowlsheugh can be accessed by a public clifftop trail, or by boats which usually emanate from the nearby harbour at the town of Stonehaven. Tens of thousands of pelagic birds return to the site every spring to breed, after wintering at sea or in more southern climates, principal species being puffins, razorbills, kittiwakes, fulmars and guillemots.

<i>Uria</i> Genus of birds

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.

<i>Synthliboramphus</i> Genus of birds

Synthliboramphus is a small genus of seabirds in the auk family from the North Pacific. The genus name Synthliboramphus is from Ancient Greek sunthlibo, "to compress", and rhamphos, "bill". The English name "Murrelet" is a diminutive of "murre", a word of uncertain origins, but which may imitate the call of the common guillemot.

<span class="mw-page-title-main">Bird colony</span> Large congregation of birds at a particular location

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<span class="mw-page-title-main">Bird egg</span> Component of avian reproduction

Bird eggs are laid by the females and range in quantity from one to up to seventeen. Clutch size may vary latitudinally within a species. Some birds lay eggs even when the eggs have not been fertilized; it is not uncommon for pet owners to find their lone bird nesting on a clutch of infertile eggs, which are sometimes called wind-eggs.

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<span class="mw-page-title-main">Bird cliff</span> Steep cliffs with nesting locations for bird colonies

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The Gros-Mécatina Migratory Bird Sanctuary is a protected area in Quebec, Canada. It consists of four islands and a reef in the Gulf of Saint Lawrence that are used as nesting sites by seabirds.

References

  1. "Guillemot, n., etymology of" The Oxford English Dictionary . 2nd ed. 1989. OED Online. Oxford University Press. Accessed Dec 17, 2007
  2. Gaston & Jones (1998)
  3. Birkhead, Tim (2016). The Most Perfect Thing: Inside (and Outside) a Bird's Egg. London: Bloomsbury. ISBN   978-1632863690.
  4. 1 2 Barkham, Patrick (16 September 2023). "'We've underrated what these birds can do': the secret life of Skomer's guillemots". The Guardian.
  5. encyclopedia of LIFE. Miles Kelly. 2017. p. 291. ISBN   978-1-78617-327-0.
  6. Birkhead, Tim R.; Thompson, Jamie E.; Montgomerie, Robert (22 August 2018). "The pyriform egg of the Common Murre (Uria aalge) is more stable on sloping surfaces". The Auk . 135 (4): 1020–1032. doi: 10.1642/auk-18-38.1 . ISSN   0004-8038.
  7. The Daily Mail April 18 1930: article by Susan Rachel Ferguson
  8. Moscato, David (30 March 2017). "Why do baby guillemots jump off cliffs before they can even fly?". Earth Touch News Network.