Gannet Temporal range: Early Miocene to recent | |
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Northern gannets (Morus bassanus) on Heligoland | |
Northern gannet calls recorded on Grassholm Island, Wales | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Aves |
Order: | Suliformes |
Family: | Sulidae |
Genus: | Morus Vieillot, 1816 |
Type species | |
Pelecanus bassanus Linnaeus, 1758 | |
Species | |
Synonyms | |
Moris |
Gannets are seabirds comprising the genus Morus in the family Sulidae, closely related to boobies. They are known as 'solan' or 'solan goose' in Scotland. A common misconception is that the Scottish name is 'guga' but this is the Gaelic name referring to the chicks only.
Gannets are large white birds with yellowish heads, black-tipped wings and long bills. Northern gannets are the largest seabirds in the North Atlantic, having a wingspan of up to two metres (6+1⁄2 feet). The other two species occur in the temperate seas around southern Africa, southern Australia, and New Zealand.
"Gannet" is derived from Old English ganot meaning "strong or masculine", ultimately from the same Old Germanic root as "gander". [1]
Morus is derived from Ancient Greek μωρόςmoros "stupid" [2] or "foolish" due to lack of fear shown by breeding gannets and boobies, allowing them to be easily killed. [3]
Gannets hunt fish by diving into the sea from a height of 30 m (100 ft) and pursuing their prey underwater, and have a number of adaptations:
Gannets can achieve speeds of 100 km/h (62.13 mph) as they strike the water, enabling them to catch fish at a much greater depth than most airborne birds. [5]
The gannet's supposed capacity for eating large quantities of fish has led to "gannet" becoming a description of somebody with a voracious appetite. [6]
Gannets are colonial breeders on islands and coasts, normally laying one chalky-blue egg. They lack brood patches and use their webbed feet to warm the eggs. [7] They reach maturity around 5 years of age. First-year birds are completely black, and subsequent subadult plumages show increasing amounts of white.
The most important nesting ground for northern gannets is the United Kingdom, with about two-thirds of the world's population. These live mainly in Scotland, including the Shetland Isles. The rest of the world's northern-gannet population nests in Canada, Ireland, the Faroe Islands, and Iceland, with small numbers in France (they are present in the Bay of Biscay), the Channel Islands, Norway, and a single colony in Germany on Heligoland. The biggest northern-gannet colony is on Scotland's Bass Rock in the Firth of Forth; in 2014, this colony contained some 75,000 pairs. [8] Sulasgeir off the coast of the Isle of Lewis, St Kilda, Grassholm in Pembrokeshire, Bempton Cliffs in the East Riding of Yorkshire, Sceilig Bheag, Ireland, Cape St Mary's, Newfoundland, and Bonaventure Island, Quebec, are also important northern-gannet breeding sites.
The three gannet species are now usually placed in the genus Morus, Abbott's booby in Papasula , and the remaining boobies in Sula . However, some authorities believe that all nine sulid species should be considered congeneric, in Sula. At one time, the various gannet species were considered to be a single species.
Common name | Scientific name and subspecies | Range | Size and ecology | IUCN status and estimated population |
---|---|---|---|---|
Northern gannet (also known as "solan goose") | Morus bassanus (Lichtenstein, MHC, 1823) | North Atlantic on coasts influenced by the Gulf Stream | Size: Habitat: Diet: | LC |
Cape gannet | Morus capensis Milne-Edwards, 1882 | Southern Africa in three islands off Namibia and three islands off South Africa | Size: Habitat: Diet: | EN |
Australasian gannet | Morus serrator (Gray, GR, 1843) | Coasts of New Zealand, Victoria, and Tasmania | Size: Habitat: Diet: | LC |
Most fossil gannets are from the Late Miocene or Pliocene, when the diversity of seabirds in general was much higher than today. The cause the decline in species at the end of the Pleistocene is not clear; increased competition due to the spread of marine mammals may have played a role.
The genus Morus is much better documented in the fossil record than Sula, though the latter is more numerous today. The reasons are not clear; boobies possibly were better adapted or simply "lucky" to occur in the right places for dealing with the challenges of the Late Pliocene ecological change, or many more fossil boobies could still await discovery. Notably, gannets are today restricted to temperate oceans, while boobies are also found in tropical waters, whereas several of the prehistoric gannet species had a more equatorial distribution than their congeners of today.
Fossil species of gannets are:
In many parts of the United Kingdom, the term "gannet" is used to refer to people who steadily eat vast quantities of food, especially at public functions. [10]
Young gannets were historically used as a food source, a tradition still practised in Ness, Scotland, where they are called "guga". Like examples of continued traditional whale harvesting, the modern-day hunting of gannet chicks results in great controversies as to whether it should continue to be given "exemption from the ordinary protection afforded to sea birds in UK and EU law". The Ness hunt is currently limited to 2,000 chicks per year and dates back at least to the Iron Age. The hunt is considered to be sustainable, since between 1902 and 2003 gannet numbers in Scotland increased dramatically from 30,000 to 180,000. [11] [12]
In The Bookshop Sketch, originally from At Last the 1948 Show (1967), a customer (Marty Feldman) asks the bookshop proprietor (John Cleese) for "the expurgated version" of Olsen's Standard Book of British Birds, "the one without the gannet", because he does not like gannets owing to their "long nasty beaks". Desperate to satisfy the customer, the proprietor tears the page about the gannet out of the book, only for the customer then to refuse to buy it because it is damaged. [13] [14] The sketch is reprised in Monty Python's Contractual Obligation Album , where the customer (Graham Chapman) says he does not like the gannet because "they wet their nests." [15]
In Series 1, Episode 3, of The F Word , Gordon Ramsay travels to the northwestern coast of Scotland and is shown how to prepare, cook and eat gannet. [16]
Puffins are any of three species of small alcids (auks) in the bird genus Fratercula. These are pelagic seabirds that feed primarily by diving in the water. They breed in large colonies on coastal cliffs or offshore islands, nesting in crevices among rocks or in burrows in the soil. Two species, the tufted puffin and horned puffin, are found in the North Pacific Ocean, while the Atlantic puffin is found in the North Atlantic Ocean.
The darters, anhingas, or snakebirds are mainly tropical waterbirds in the family Anhingidae, which contains a single genus, Anhinga. There are four living species, three of which are very common and widespread while the fourth is rarer and classified as near-threatened by the IUCN. The term snakebird is usually used without any additions to signify whichever of the completely allopatric species occurs in any one region. It refers to their long thin neck, which has a snake-like appearance when they swim with their bodies submerged, or when mated pairs twist it during their bonding displays. "Darter" is used with a geographical term when referring to particular species. It alludes to their manner of procuring food, as they impale fishes with their thin, pointed beak. The American darter is more commonly known as the anhinga. It is sometimes called "water turkey" in the southern United States; though the anhinga is quite unrelated to the wild turkey, they are both large, blackish birds with long tails that are sometimes hunted for food.
Phalacrocoracidae is a family of approximately 40 species of aquatic birds commonly known as cormorants and shags. Several different classifications of the family have been proposed, but in 2021 the International Ornithologists' Union (IOU) adopted a consensus taxonomy of seven genera. The great cormorant and the common shag are the only two species of the family commonly encountered in Britain and Ireland and "cormorant" and "shag" appellations have been later assigned to different species in the family somewhat haphazardly.
A booby is a seabird in the genus Sula, part of the family Sulidae. Boobies are closely related to the gannets (Morus), which were formerly included in Sula.
The bird family Sulidae comprises the gannets and boobies. Collectively called sulids, they are medium-large coastal seabirds that plunge-dive for fish and similar prey. The 10 species in this family are often considered congeneric in older sources, placing all in the genus Sula. However, Sula and Morus (gannets) can be readily distinguished by morphological, behavioral, and DNA sequence characters. Abbott's booby (Papasula) is given its own genus, as it stands apart from both in these respects. It appears to be a distinct and ancient lineage, maybe closer to the gannets than to the true boobies.
The northern gannet is a seabird, the largest species of the gannet family, Sulidae. It is native to the coasts of the Atlantic Ocean, breeding in Western Europe and Northeastern North America. It is the largest seabird in the northern Atlantic. The sexes are similar in appearance. The adult northern gannet has a mainly white streamlined body with a long neck, and long and slender wings. It is 87–100 cm long with a 170–180 cm (67–71 in) wingspan. The head and nape have a buff tinge that is more prominent in breeding season, and the wings are edged with dark brown-black feathers. The long, pointed bill is blue-grey, contrasting with black, bare skin around the mouth and eyes. Juveniles are mostly grey-brown, becoming increasingly white in the five years it takes them to reach maturity.
The Australasian gannet, also known as the Australian gannet or tākapu, is a large seabird of the booby and gannet family, Sulidae. Adults are mostly white, with black flight feathers at the wingtips and lining the trailing edge of the wing. The central tail feathers are also black. The head is tinged buff-yellow, with a pearly grey bill edged in dark grey or black, and blue-rimmed eyes. Young birds have mottled plumage in their first year, dark above and light below. The head is an intermediate mottled grey, with a dark bill. The birds gradually acquire more white in subsequent seasons until they reach maturity after five years.
The brown booby is a large seabird of the booby family Sulidae, of which it is perhaps the most common and widespread species. It has a pantropical range, which overlaps with that of other booby species. The gregarious brown booby commutes and forages at low height over inshore waters. Flocks plunge-dive to take small fish, especially when these are driven near the surface by their predators. They nest only on the ground, and roost on solid objects rather than the water surface.
The red-footed booby is a large seabird of the booby family, Sulidae. Adults always have red feet, but the colour of the plumage varies. They are powerful and agile fliers, but they are clumsy in takeoffs and landings. They are found widely in the tropics, and breed colonially in coastal regions, especially isolated islands such as St. Brandon, Mauritius. The species faces few natural or man-made threats, although its population is declining; it is considered to be a least-concern species by the International Union for Conservation of Nature (IUCN).
The Cape gannet is a large seabird of the gannet family, Sulidae.
Sula Sgeir is a small, uninhabited Scottish islet in the North Atlantic, 18 kilometres west of Rona. One of the most remote islands of the British Isles, it lies approximately forty nautical miles north of Lewis and is best known for its population of gannets. It has a narrow elongated shape running north-northeast to south-southwest, and is approximately 900 m long by typically 100 m wide.
The masked booby, also called the masked gannet or the blue-faced booby, is a large seabird of the booby and gannet family, Sulidae. First described by the French naturalist René-Primevère Lesson in 1831, the masked booby is one of six species of booby in the genus Sula. It has a typical sulid body shape, with a long pointed yellowish bill, long neck, aerodynamic body, long slender wings and pointed tail. The adult is bright white with black wings, a black tail and a dark face mask; at 75–85 cm (30–33 in) long, it is the largest species of booby. The sexes have similar plumage. This species ranges across tropical oceans, except in the eastern Atlantic and eastern Pacific. In the latter, it is replaced by the Nazca booby, which was formerly regarded as a subspecies of masked booby.
The great albatrosses are seabirds in the genus Diomedea in the albatross family. The genus Diomedea formerly included all albatrosses except the sooty albatrosses, but in 1996 the genus was split, with the mollymawks and the North Pacific albatrosses both being elevated to separate genera.
The North Pacific albatrosses are large seabirds from the genus Phoebastria in the albatross family. They are the most tropical of the albatrosses, with two species nesting in the Northwestern Hawaiian Islands, one on sub-tropical islands south of Japan, and one nesting on the equator.
The Nazca booby is a large seabird of the booby family, Sulidae, native to the eastern Pacific. First described by Walter Rothschild in 1902, it was long considered a subspecies of the masked booby until recognised as distinct genetically and behaviorally in 2002. It has a typical sulid body shape, with a long pointed orange-yellow bill, long neck, aerodynamic body, long slender wings and pointed tail. The adult is bright white with black and white wings, a black tail and a dark face mask.
The order Suliformes is an order of birds recognised by the International Ornithologist's Union. Regarding the recent evidence that the traditional Pelecaniformes is polyphyletic, it has been suggested that the group be divided to reflect the true evolutionary relationships; a 2017 study indicated that they are most closely related to Otidiformes (bustards) and Ciconiiformes (storks).
Bimbisula is an extinct genus of sulid bird known from fossils discovered in Pliocene rocks of South Carolina, United States. The type and only named species is B. melanodactylos. The genus name is a combination of the Gullah name "Bimbi", meaning dawn, with "sula", an Icelandic word for "fool" that has been used to describe boobies in general. The species name is Greek for "black-fingered", referring to the iron staining that darkened the bones of the type specimen. Bimbisula melanodactylos is based on Charleston Museum PV2818, a partial skeleton including fragments of the skull, shoulder girdle, left upper arm, right hand, and fused hip vertebrae, and much of the right leg. It was collected in 1980 by James Malcolm from a locality along the Seaboard Coast Line Railroad in Charleston County in the vicinity of the Dorchester Road overpass. A second specimen assigned to the species, Science Museum of Minnesota P90.38.8, consists of a cranium discovered in October 1990 by Bruce Erickson near the Wando Terminal. Both specimens were found in the Goose Creek Limestone, of middle Pliocene age. The type specimen comes from the upper part of the formation, which is approximately 3.6 to 3.5 million years old. The exact stratigraphy of the second specimen is uncertain, and it may be anywhere from 3.9 to 3.5 million years old. Bimbisula was a large sulid, comparable in size to smaller species of gannets, and its skeleton shows a combination of booby-like and gannet-like characteristics.
The Temblor Formation is a geologic formation in California. It preserves fossils dating back from the Late Oligocene to the Middle Miocene of the Neogene period. It is notable for the famous Sharktooth Hill deposit.
Joseph Bryan Nelson MBE FRSE was a British ornithologist, environmental activist and academic. He was a prominent authority on seabirds, publishing numerous books and articles on gannets, cormorants and other species, teaching zoology at the University of Aberdeen, and conducting pioneering ornithological research in Jordan, Christmas Island and the Galápagos Islands. In his lifetime, Nelson was "acclaimed as the world's leading expert on the northern gannet". He also contributed to the creation of Christmas Island National Park, which helped to preserve the habitat of the endangered Abbott's booby.