Portal:Birds
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The Birds Portal
Birds are a group of warm-blooded vertebrates constituting the class Aves (Latin: [ˈaːwεs]), characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton. Birds live worldwide and range in size from the 5.5 cm (2.2 in) bee hummingbird to the 2.8 m (9 ft 2 in) common ostrich. There are over 11,000 living species and they are split into 44 orders. More than half are passerine or "perching" birds. Birds have wings whose development varies according to species; the only known groups without wings are the extinct moa and elephant birds. Wings, which are modified forelimbs, gave birds the ability to fly, although further evolution has led to the loss of flight in some birds, including ratites, penguins, and diverse endemic island species. The digestive and respiratory systems of birds are also uniquely adapted for flight. Some bird species of aquatic environments, particularly seabirds and some waterbirds, have further evolved for swimming. The study of birds is called ornithology.
Birds are feathered theropod dinosaurs and constitute the only known living dinosaurs. Likewise, birds are considered reptiles in the modern cladistic sense of the term, and their closest living relatives are the crocodilians. Birds are descendants of the primitive avialans (whose members include Archaeopteryx) which first appeared during the Late Jurassic. According to some estimates, modern birds (Neornithes) evolved in the Late Cretaceous or between the Early and Late Cretaceous (100 Ma) and diversified dramatically around the time of the Cretaceous–Paleogene extinction event 66 million years ago, which killed off the pterosaurs and all non-ornithuran dinosaurs.
Many social species preserve knowledge across generations (culture). Birds are social, communicating with visual signals, calls, and songs, and participating in such behaviour as cooperative breeding and hunting, flocking, and mobbing of predators. The vast majority of bird species are socially (but not necessarily sexually) monogamous, usually for one breeding season at a time, sometimes for years, and rarely for life. Other species have breeding systems that are polygynous (one male with many females) or, rarely, polyandrous (one female with many males). Birds produce offspring by laying eggs which are fertilised through sexual reproduction. They are usually laid in a nest and incubated by the parents. Most birds have an extended period of parental care after hatching.
Many species of birds are economically important as food for human consumption and raw material in manufacturing, with domesticated and undomesticated birds being important sources of eggs, meat, and feathers. Songbirds, parrots, and other species are popular as pets. Guano (bird excrement) is harvested for use as a fertiliser. Birds figure throughout human culture. About 120 to 130 species have become extinct due to human activity since the 17th century, and hundreds more before then. Human activity threatens about 1,200 bird species with extinction, though efforts are underway to protect them. Recreational birdwatching is an important part of the ecotourism industry. (Full article...)
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The white-rumped swallow (Tachycineta leucorrhoa) is a species of bird in the family Hirundinidae. First described and given its binomial name by French ornithologist Louis Pierre Vieillot in 1817, it was for many years considered a subspecies of the Chilean swallow. The species is monotypic with no known population variations. It has a white supraloral streak, or streak above its lores (the region between a bird's eye and nostrils), which can be used to differentiate it from the Chilean swallow. The lores, ear coverts, tail, and wings are black, with white tips on the inner secondaries, tertials, and greater coverts of the wings. The rest of the upperparts are a glossy blue. Its underparts and underwing-coverts are white, in addition to the rump, as the name suggests. The sexes are similar, and the juvenile is duller and browner with a dusky breast.
This species usually builds its nest in holes in trees or dead snags or under or in artificial structures like fence posts and the eaves of buildings. The white-rumped swallow is solitary and nests in distributed pairs during the breeding season. The breeding season is from October to December in Brazil and from October to February in neighboring Argentina. Usually, only one brood with four to seven eggs is laid, although a second one will occasionally be laid. The female incubates the eggs over a period usually between 15 and 16 days, with the fledging usually occurring between 21 and 25 days after hatching.
This swallow is found in Argentina, Bolivia, Brazil, Paraguay, Peru, and Uruguay. Its natural habitats are: (Full article...) -
The Papuan mountain pigeon (Gymnophaps albertisii) is a species of bird in the pigeon family, Columbidae. It is found in the Bacan Islands, New Guinea, the D'Entrecasteaux Islands, and the Bismarck Archipelago, where it inhabits primary forest, montane forest, and lowlands. It is a medium-sized species of pigeon, being 33–36 cm (13–14 in) long and weighing 259 g (9.1 oz) on average. Adult males have slate-grey upperparts, chestnut-maroon throats and bellies, whitish breasts, and a pale grey terminal tail band. The lores and orbital region are bright red. Females are similar, but have grayish breasts and grey edges to the throat feathers.
The Papuan mountain pigeon is frugivorous, feeding on figs and drupes. It breeds from October to March in the Schrader Range, but may breed throughout the year across its range. It builds nests out of sticks and twigs in a tree or makes a ground nest in short dry grass, and lays a single egg. The species is very social and is usually seen in flocks of 10–40 birds, although some groups can have as many as 80 individuals. It is listed as being of least concern by the International Union for Conservation of Nature (IUCN) on the IUCN Red List due to its large range and lack of significant population decline. (Full article...) -
Pigeon with German miniature camera, probably during the First World War
Pigeon photography is an aerial photography technique invented in 1907 by the German apothecary Julius Neubronner, who also used pigeons to deliver medications. A homing pigeon was fitted with an aluminium breast harness to which a lightweight time-delayed miniature camera could be attached. Neubronner's German patent application was initially rejected, but was granted in December 1908 after he produced authenticated photographs taken by his pigeons. He publicized the technique at the 1909 Dresden International Photographic Exhibition, and sold some images as postcards at the Frankfurt International Aviation Exhibition and at the 1910 and 1911 Paris Air Shows.
Initially, the military potential of pigeon photography for aerial reconnaissance appeared interesting. Battlefield tests in World War I provided encouraging results, but the ancillary technology of mobile dovecotes for messenger pigeons had the greatest impact. Owing to the rapid development of aviation during the war, military interest in pigeon photography faded and Neubronner abandoned his experiments. The idea was briefly resurrected in the 1930s by a Swiss clockmaker, and reportedly also by the German and French militaries. Although war pigeons were deployed extensively during World War II, it is unclear to what extent, if any, birds were involved in aerial reconnaissance. The United States Central Intelligence Agency (CIA) later developed a battery-powered camera designed for espionage pigeon photography; details of its use remain classified.
The construction of sufficiently small and light cameras with a timer mechanism, and the training and handling of the birds to carry the necessary loads, presented major challenges, as did the limited control over the pigeons' position, orientation and speed when the photographs were being taken. In 2004, the British Broadcasting Corporation (BBC) used miniature television cameras attached to falcons and goshawks to obtain live footage, and today some researchers, enthusiasts and artists similarly deploy crittercams with various species of animals. (Full article...) -
The bee-eaters are a group of birds in the family Meropidae, containing three genera and thirty-one species. Most species are found in Africa and Asia, with a few in southern Europe, Australia, and New Guinea. They are characterised by richly coloured plumage, slender bodies, and usually elongated central tail feathers. All have long down-turned bills and medium to long wings, which may be pointed or round. Male and female plumages are usually similar.
As their name suggests, bee-eaters predominantly eat flying insects, especially bees and wasps, which are caught on the wing from an open perch. The insect's stinger is removed by repeatedly hitting and rubbing the insect on a hard surface. During this process, pressure is applied to the insect's body, thereby discharging most of the venom.
Most bee-eaters are gregarious. They form colonies, nesting in burrows tunnelled into vertical sandy banks, often at the side of a river or in flat ground. As they mostly live in colonies, large numbers of nest holes may be seen together. The eggs are white, with typically five to the clutch. Most species are monogamous, and both parents care for their young, sometimes with assistance from related birds in the colony. (Full article...) -
The tree swallow (Tachycineta bicolor) is a migratory bird of the family Hirundinidae. Found in the Americas, the tree swallow was first described in 1807 by French ornithologist Louis Vieillot as Hirundo bicolor. It has since been moved to its current genus, Tachycineta, within which its phylogenetic placement is debated. The tree swallow has glossy blue-green upperparts, with the exception of the blackish wings and tail, and white underparts. The bill is black, the eyes dark brown, and the legs and feet pale brown. The female is generally duller than the male, and the first-year female has mostly brown upperparts, with some blue feathers. Juveniles have brown upperparts, and gray-brown-washed breasts. The tree swallow breeds in the US and Canada. It winters along southern US coasts south, along the Gulf Coast, to Panama and the northwestern coast of South America, and in the West Indies.
The tree swallow nests either in isolated pairs or loose groups, in both natural and artificial cavities. Breeding can start as soon as early May, although this date is occurring earlier because of climate change, and it can end as late as July. This bird is generally socially monogamous (although about 8% of males are polygynous), with high levels of extra-pair paternity. This can benefit the male, but since the female controls copulation, the lack of resolution on how this behavior benefits females makes the high level of extra-pair paternity puzzling. The female incubates the clutch of two to eight (but usually four to seven) pure white eggs for around 14 to 15 days. The chicks hatch slightly asynchronously, allowing the female to prioritize which chicks to feed in times of food shortage. They generally fledge about 18 to 22 days after hatching. The tree swallow is sometimes considered a model organism, due to the large amount of research done on it.
An aerial insectivore, the tree swallow forages both alone and in groups, eating mostly insects, in addition to mollusks, spiders, and fruit. The nestlings, like the adult, primarily eat insects, fed to it by both sexes. This swallow is vulnerable to parasites, but, when on nestlings, these do little damage. The effect of disease can become stronger as a tree swallow gets older, as some parts of the immune system decline with age. Acquired T cell-mediated immunity, for example, decreases with age, whereas both innate and acquired humoral immunity do not. Because of its large range and stable population, the tree swallow is considered to be least concern by the International Union for Conservation of Nature. In the US, it is protected by the Migratory Bird Treaty Act of 1918, and in Canada by the Migratory Birds Convention Act. This swallow is negatively affected by human activities, such as the clearing of forests; acidified lakes can force a breeding tree swallow to go long distances to find calcium-rich food items to feed to its chicks. (Full article...) -
The golden swallow (Tachycineta euchrysea) is a swallow endemic to the Caribbean island of Hispaniola (split between the Dominican Republic and Haiti) and was once native to Jamaica, but is now extirpated there. It is restricted to isolated montane forests that primarily consist of the Hispaniolan pine (Pinus occidentalis). This species is considered to be a vulnerable species by the International Union for Conservation of Nature (IUCN). The exact cause of its extirpation from Jamaica is unknown, but likely factors include predation by introduced mammals and habitat loss, although the habitat loss theory is not supported by much evidence. The last sighting of the nominate subspecies was in Hardwar Gap (located on the boundary between Saint Andrew and Portland parishes), with three birds being seen on 8 June 1989.
A relatively small swallow, the Jamaican subspecies had bronze upperparts and bronze sides of the head. The ears and lores were duller and the forehead area was more green than bronze. The shoulders, back, rump, and uppertail-coverts were, on the other hand, a coppery-bronze colour. The lesser and median coverts were more coppery, with the greater and primary-wing-coverts more of a dusky green. The primaries, secondaries, and tail were a dusky bronze-green. The underparts were mostly white. The legs, feet, and irides were dark brown, and the bill was black. The female was similar, but with its breast, and occasionally throat and undertail-coverts, mottled grey-brown. The juvenile was also mottled-grey brown, and duller overall. The Hispaniolan subspecies, T. e. sclateri, is primarily differentiated by its more deeply forked tail, blue-green forehead and uppertail-coverts, and blue-black wings and tail.
In Hispaniola, this swallow breeds from April to July, where it lays a clutch consisting of two to four white eggs. It formerly bred from June to July in Jamaica. The eggs are laid in a cup nest that is mainly found in Hispaniolan pine. It also nests in caves, under the eaves of houses, in burned stands, and in nest boxes. This swallow is an aerial insectivore, foraging for insects at heights that are usually under 20 m (66 ft), and very rarely at heights over 30 m (98 ft). When foraging, it is known to explore most habitats except forests. (Full article...) -
The Arctic tern (Sterna paradisaea) is a tern in the family Laridae. This bird has a circumpolar breeding distribution covering the Arctic and sub-Arctic regions of Europe (as far south as Brittany), Asia, and North America (as far south as Massachusetts). The species is strongly migratory, seeing two summers each year as it migrates along a convoluted route from its northern breeding grounds to the Antarctic coast for the southern summer and back again about six months later. Recent studies have shown average annual round-trip lengths of about 70,900 km (44,100 mi) for birds nesting in Iceland and Greenland and about 48,700 km (30,300 mi) for birds nesting in the Netherlands. These are by far the longest migrations known in the animal kingdom. The Arctic tern nests once every one to three years (depending on its mating cycle).
Arctic terns are medium-sized birds. They have a length of 28–39 cm (11–15 in) and a wingspan of 65–75 cm (26–30 in). They are mainly grey and white plumaged, with a red/orange beak and feet, white forehead, a black nape and crown (streaked white), and white cheeks. The grey mantle is 305 mm (12.0 in), and the scapulae are fringed brown, some tipped white. The upper wing is grey with a white leading edge, and the collar is completely white, as is the rump. The deeply forked tail is whitish, with grey outer webs.
Arctic terns are long-lived birds, with many reaching fifteen to thirty years of age. They eat mainly fish and small marine invertebrates. The species is abundant, with an estimated two million individuals. While the trend in the number of individuals in the species as a whole is not known, exploitation in the past has reduced this bird's numbers in the southern reaches of its ranges. (Full article...) -
The Australasian gannet (Morus serrator), 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 species range over water above the continental shelf along the southern and eastern Australian coastline, from Steep Point in Western Australia to Rockhampton, Queensland, as well as the North and South Islands of New Zealand, Lord Howe and Norfolk Islands. Nesting takes place in colonies along the coastlines of New Zealand, Victoria and Tasmania—mostly on offshore islands, although there are several mainland colonies in both countries. Highly territorial when breeding, the Australasian gannet performs agonistic displays to defend its nest. Potential and mated pairs engage in courtship and greeting displays. The nest is a cup-shaped mound composed of seaweed, earth, and other debris, built by the female from material mainly gathered by the male. A single pale blue egg is laid yearly, though lost eggs may be replaced. The chick is born featherless but is soon covered in white down. Fed regurgitated fish by its parents, it grows rapidly and outweighs the average adult when it fledges.
These birds are plunge divers and spectacular fishers, plunging into the ocean at high speed. They eat mainly squid and forage fish that school near the surface. The species faces few natural or man-made threats, and since its population is growing it is considered to be a least-concern species by the International Union for Conservation of Nature (IUCN). (Full article...) -
The common starling (Sturnus vulgaris), also known simply as the starling in Great Britain and Ireland, and as European starling in North America, is a medium-sized passerine bird in the starling family, Sturnidae. It is about 20 cm (8 in) long and has glossy black plumage with a metallic sheen, which is speckled with white at some times of the year. The legs are pink and the bill is black in winter and yellow in summer; young birds have browner plumage than the adults. Its gift for mimicry has been noted in literature including the Mabinogion and the works of Pliny the Elder and William Shakespeare.
The common starling has about 12 subspecies breeding in open habitats across its native range in temperate Europe and across the Palearctic to western Mongolia, and it has been introduced as an invasive species to Australia, New Zealand, Canada, the United States, Mexico, Argentina, South Africa and Fiji. This bird is resident in western and southern Europe and southwestern Asia, while northeastern populations migrate south and west in the winter within the breeding range and also further south to Iberia and North Africa. The common starling builds an untidy nest in a natural or artificial cavity in which four or five glossy, pale blue eggs are laid. These take two weeks to hatch and the young remain in the nest for another three weeks. There are normally one or two breeding attempts each year. This species is omnivorous, taking a wide range of invertebrates, as well as seeds and fruit. It is hunted by various mammals and birds of prey, and is host to a range of external and internal parasites.
Large flocks typical of this species can be beneficial to agriculture by controlling invertebrate pests; however, starlings can also be pests themselves when they feed on fruit and sprouting crops. Common starlings may also be a nuisance through the noise and mess caused by their large urban roosts. Introduced populations in particular have been subjected to a range of controls, including culling, but these have had limited success, except in preventing the colonisation of Western Australia. (Full article...) -
The splendid fairywren (Malurus splendens) is a passerine bird in the Australasian wren family, Maluridae. It is also known simply as the splendid wren or more colloquially in Western Australia as the blue wren. The splendid fairywren is found across much of the Australian continent from central-western New South Wales and southwestern Queensland over to coastal Western Australia. It inhabits predominantly arid and semi-arid regions. Exhibiting a high degree of sexual dimorphism, the male in breeding plumage is a small, long-tailed bird of predominantly bright blue and black colouration. Non-breeding males, females and juveniles are predominantly grey-brown in colour; this gave the early impression that males were polygamous as all dull-coloured birds were taken for females. It comprises several similar all-blue and black subspecies that were originally considered separate species.
Like other fairywrens, the splendid fairywren is notable for several peculiar behavioural characteristics; the birds are socially monogamous and sexually promiscuous, meaning that although they form pairs between one male and one female, each partner will mate with other individuals and even assist in raising the young from such trysts. Male fairywrens pluck pink or purple petals and display them to females as part of a courtship display.
The habitat of the splendid fairywren ranges from forest to dry scrub, generally with ample vegetation for shelter. Unlike the eastern superb fairywren, it has not adapted well to human occupation of the landscape and has disappeared from some urbanised areas. The splendid fairywren mainly eats insects and supplements its diet with seeds. (Full article...) -
The macaroni penguin (Eudyptes chrysolophus) is a species of penguin found from the Subantarctic to the Antarctic Peninsula. One of six species of crested penguin, it is very closely related to the royal penguin, and some authorities consider the two to be a single species. It bears a distinctive yellow crest on its forehead. Its face and upperparts are black and sharply delineated from the white underparts. Adults weigh on average 5.5 kg (12 lb) and are 70 cm (28 in) in length. The male and female are similar in appearance; the male is slightly larger and stronger with a larger bill. Like all penguins, it is flightless, with a streamlined body and wings stiffened and flattened into flippers for a marine lifestyle.
Its diet consists of a variety of crustaceans, mainly krill, as well as small fish and cephalopods; the species consumes more marine life annually than any other species of seabird. These birds moult once a year, spending about three to four weeks ashore, before returning to the sea. Numbering up to 100,000 individuals, the breeding colonies of the macaroni penguin are among the largest and densest of all penguin species. After spending the summer breeding, penguins disperse into the oceans for six months; a 2009 study found that macaroni penguins from Kerguelen travelled over 10,000 km (6,200 mi) in the central Indian Ocean.
With about 18 million individuals, the macaroni penguin is the most numerous penguin species. Widespread declines in populations have been recorded since the mid-1970s and their conservation status classification is vulnerable. (Full article...) -
The Sind sparrow (Passer pyrrhonotus) is a passerine bird of the sparrow family, Passeridae, found around the Indus valley region in South Asia. Its name refers to the province of Sindh, and it is also known as the jungle, Sind jungle, or rufous-backed sparrow. Very similar to the related house sparrow, it is smaller and has distinguishing plumage features. As in the house sparrow, the male has brighter plumage than female and young birds, including black markings and a grey crown. Distinctively, the male has a chestnut stripe running down its head behind the eye, and the female has a darker head than other sparrow species. Its main vocalisations are soft chirping calls that are extended into longer songs with other sounds interspersed by breeding males. Historically, this species was thought to be very closely related to the house sparrow, but its closest evolutionary affinities may lie elsewhere. The species was discovered around 1840, but went undetected for several decades afterwards.
Within its Indus valley breeding range in Pakistan and western India, the Sind sparrow is patchily distributed in riverine and wetland habitats with thorny scrub and tall grass. During the non-breeding season, some birds enter drier habitats as they disperse short distances from their breeding habitat, or migrate into western Pakistan and the extreme east of Iran. Since this species is fairly common and expanding its range, it is assessed as least concern on the IUCN Red List. The Sind sparrow is social while feeding and gathers in small groups both while breeding and during winter dispersal. It feeds mostly on seeds and less often on insects, foraging close to the ground. Nests are made in the branches of thorny trees, and are untidy globular masses constructed from grass or other plant matter and lined with softer material. Both sexes are involved in building the nest and caring for the young, and usually raise two clutches of three to five young each breeding season. (Full article...) -
The northern gannet (Morus bassanus) 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 (34+1⁄2–39+1⁄2 in) 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.
Nesting takes place in colonies on both sides of the North Atlantic, the largest of which are at Bass Rock (75,000 pairs as of 2014), St. Kilda (60,000 pairs as of 2013) and Ailsa Craig (33,000 pairs as of 2014) in Scotland, Grassholm in Wales, and Bonaventure Island (60,000 pairs in 2009) off the coast of Quebec. Its breeding range has extended northward and eastward, with colonies being established on Russia's Kola Peninsula in 1995 and Bear Island (the southernmost island of Svalbard), in 2011. Colonies are mostly located on offshore islands with cliffs, from which the birds can more easily launch into the air. The northern gannet undertakes seasonal migrations and catches fish (which are the mainstay of its diet) by making high-speed dives into the sea.
The northern gannet was previously hunted for food in certain parts of its range, and although that practice still continues in the Outer Hebrides of Scotland and the Faroe Islands, the bird faces few other natural or man-made threats. Since its population is growing, the International Union for Conservation of Nature considers it a least-concern species. Because it is both a conspicuous and a common bird, it is referred to in several ancient myths and legends. (Full article...) -
The yellowhammer (Emberiza citrinella) is a passerine bird in the bunting family that is native to Eurasia and has been introduced to New Zealand and Australia. Most European birds remain in the breeding range year-round, but the eastern subspecies is partially migratory, with much of the population wintering further south. The male yellowhammer has a bright yellow head, streaked brown back, chestnut rump, and yellow under parts. Other plumages are duller versions of the same pattern. The yellowhammer is common in open areas with some shrubs or trees, and forms small flocks in winter. Its song has a rhythm like "A little bit of bread and no cheese". The song is very similar to that of its closest relative, the pine bunting, with which it interbreeds.
Breeding commences mainly in April and May, with the female building a lined cup nest in a concealed location on or near the ground. The three to five eggs are patterned with a mesh of fine dark lines, giving rise to the old name for the bird of "scribble lark" or "writing lark". The female incubates the eggs for 12–14 days prior to hatching, and broods the altricial downy chicks until they fledge 11–13 days later. Both adults feed the chick in the nest and raise two or three broods each year. The nest may be raided by rodents or corvids, and the adults are hunted by birds of prey. Yellowhammers feed on the ground, usually in flocks outside the breeding season. Their diet is mainly seeds, supplemented by invertebrates in the breeding season. Changes to agricultural practices have led to population declines in western Europe, but its large numbers and huge range mean that the yellowhammer is classed as being of least concern by the International Union for Conservation of Nature.
This conspicuous yellow bird has inspired poems by Robert Burns and John Clare, and its characteristic song has influenced musical works by Beethoven and Messiaen. Children's writer Enid Blyton helped to popularise the standard English representation of the song. (Full article...) -
The red-necked grebe (Podiceps grisegena) is a migratory aquatic bird found in the temperate regions of the northern hemisphere. Its wintering habitat is largely restricted to calm waters just beyond the waves around ocean coasts, although some birds may winter on large lakes. Grebes prefer shallow bodies of fresh water such as lakes, marshes or fish-ponds as breeding sites.
The red-necked grebe is a fairly drab dusky-grey bird in winter. During the breeding season, it acquires the distinctive red neck plumage, black cap and contrasting pale grey face from which its name was derived. It also has an elaborate courtship display and a variety of loud mating calls. Once paired, it builds a nest from water plants on top of floating vegetation in a shallow lake or bog.
Like all grebes, the red-necked is a good swimmer and particularly swift diver, and responds to danger by diving rather than flying. The feet are positioned far back on the body, near the tail, which makes the bird ungainly on land. It dives for fish or picks insects off vegetation; it also swallows its own feathers, possibly to protect the digestive system. The conservation status of its two subspecies, P. g. grisegena, found in Europe and western Asia, and the larger P. g. holbolii (sometimes called Holbøll's grebe), found in North America and eastern Siberia, is evaluated as Least Concern, and the global population is stable or growing. (Full article...) -
The long-tailed ground roller (Uratelornis chimaera) is a species of bird in the ground roller family Brachypteraciidae, placed in the monotypic genus Uratelornis. Endemic to arid spiny forests near the coast in southwestern Madagascar, this ground roller occurs at extremely low population densities throughout its habitat. This species requires shade and a deep layer of leaves on the ground, and it is absent from parts of the spiny forest lacking these features. It has no recognized subspecies, and its closest relative is the scaly ground roller. The long-tailed ground roller is the only ground roller to definitively display sexual dimorphism (differences in plumage or size between sexes). It is a medium-sized bird with a plump silhouette and a long tail. The upperparts are dark brown with black streaks while the underparts are light gray. The white throat is framed by black malar stripes and a black breastband, and a white stripe is present at the base of the bill. Sky-blue feathers are visible at the edge of the wings and the tail. Calls are rarely made outside the breeding season, though multiple courtship calls are made.
These ground rollers feed primarily on invertebrates, including ants, beetles, butterflies, and worms, which they find by searching through deep leaf litter or by remaining still and watching attentively. The ground roller primarily runs through its habitat on its strong legs, as its wings are relatively weak. It is a monogamous species, and it defends a territory during the breeding season of October to February. It digs a tunnel in the sand, at the end of which is a wider chamber where it makes its nest out of leaves and earthy pellets. Two to four eggs are laid. After the chicks fledge, the birds continue living in family groups until at least February before dispersing more widely across the scrubland.
This bird is classified as vulnerable by the IUCN and is threatened by habitat destruction. Since the arid, spiny forests in which it lives are not protected by the Malagasy government, it is losing habitat to slash-and-burn agriculture, charcoal collection, and logging. It is also hunted by the native peoples of Madagascar. (Full article...) -
The greater crested tern (Thalasseus bergii), also called crested tern, swift tern, or great crested tern, is a tern in the family Laridae that nests in dense colonies on coastlines and islands in the tropical and subtropical Old World. Its four or five subspecies breed in the area from South Africa around the Indian Ocean to the central Pacific and Australia, all populations dispersing widely from the breeding range after nesting. This large tern is closely related to other species in its genus, but can be distinguished by its darker, battleship-grey upperparts, white forehead even in full breeding plumage, and greenish-tinged yellow (not orange or black) bill colour.
The greater crested tern has dark grey upperparts, white underparts, a yellow bill, and a shaggy black crest that recedes in winter. Its young have a distinctive appearance, with strongly patterned grey, brown and white plumage, and rely on their parents for food for several months after they have fledged. Like all members of the genus Thalasseus, the greater crested tern feeds by plunge diving for fish, usually in marine environments; the male offers fish to the female as part of the courtship ritual.
This is an adaptable species that has learned to follow fishing boats for jettisoned bycatch, and to use unusual nest sites such as the roofs of buildings and artificial islands in salt pans and sewage works. Its eggs and young are taken by gulls and ibises, and human activities such as fishing, shooting and egg harvesting have caused local population declines. There are no global conservation concerns for this bird, which has a stable total population of more than 500,000 individuals. (Full article...) -
The Zapata rail (Mustelirallus cerverai, syn.: Cyanolimnas cerverai) is a medium-sized, dark-coloured rail. It has brown upperparts, greyish-blue underparts, a red-based yellow bill, white undertail coverts, and red eyes and legs. Its short wings render it almost flightless. It is endemic to the wetlands of the Zapata Peninsula in southern Cuba, where its only known nest was found in sawgrass tussocks. Little is known of its diet or reproductive behaviour, and its described calls may belong to a different species.
The species was discovered by Spanish zoologist Fermín Zanón Cervera in March 1927 in the Zapata Swamp near Santo Tomás, in the southern Matanzas Province of Cuba. The swamp holds one other bird found nowhere else, the Zapata wren, and also gives its name to the Zapata sparrow. Due to ongoing habitat loss in its limited range, its small population size, and predation by introduced mammals and catfish, the Zapata rail is evaluated as critically endangered on the IUCN Red List of Threatened Species. Tourism and climate change may pose threats in the future. (Full article...) -
The Australian magpie (Gymnorhina tibicen) is a black and white passerine bird native to Australia and southern New Guinea, and introduced to New Zealand, and the Fijian island of Taveuni. Although once considered to be three separate species, it is now considered to be one, with nine recognised subspecies. A member of the Artamidae, the Australian magpie is placed in its own genus Gymnorhina and is most closely related to the black butcherbird (Melloria quoyi). It is not closely related to the Eurasian magpie, which is a corvid.
The adult Australian magpie is a fairly robust bird ranging from 37 to 43 cm (14.5 to 17 in) in length, with black and white plumage, gold brown eyes and a solid wedge-shaped bluish-white and black bill. The male and female are similar in appearance, but can be distinguished by differences in back markings. The male has pure white feathers on the back of the head where the female has white blending to grey feathers. With its long legs, the Australian magpie walks rather than waddles or hops and spends much time on the ground.
Described as one of Australia's most accomplished songbirds, the Australian magpie has an array of complex vocalisations. It is omnivorous, with the bulk of its varied diet made up of invertebrates. It is generally sedentary and territorial throughout its range. Common and widespread, it has adapted well to human habitation and is a familiar bird of parks, gardens and farmland in Australia and New Guinea. This species is commonly fed by households around Australia, but in spring (and occasionally in autumn) a small minority of breeding magpies (almost always males) become aggressive, swooping and attacking those who approach their nests. Research has shown that magpies can recognise at least 100 different people, and may be less likely to swoop individuals they have befriended. (Full article...) -
Newton's parakeet (Psittacula exsul), also known as the Rodrigues parakeet or Rodrigues ring-necked parakeet, is an extinct species of parrot that was endemic to the Mascarene island of Rodrigues in the western Indian Ocean. Several of its features diverged from related species, indicating long-term isolation on Rodrigues and subsequent adaptation. The rose-ringed parakeet of the same genus is a close relative and probable ancestor. Newton's parakeet may itself have been ancestral to the endemic parakeets of nearby Mauritius and Réunion.
Around 40 centimetres (16 in) long, Newton's parakeet was roughly the size of a rose-ringed parakeet. Its plumage was mostly greyish or slate blue in colour, which is unusual in Psittacula, a genus containing mostly green species. The male had stronger colours than the female and possessed a reddish instead of black beak, but details of a mature male's appearance are uncertain; only one male specimen is known, and it is believed to be immature. Mature males might have possessed red patches on the wing like the related Alexandrine parakeet. Both sexes had a black collar running from the chin to the nape, but this was clearer in the male. The legs were grey and the iris yellow. Some 17th-century accounts indicate that some members of the species were green, which would suggest that both blue and green colour morphs occurred, but no definitive explanation exists for these reports. Little is known about its behaviour in life, but it may have fed on the nuts of the bois d'olive tree, along with leaves. It was very tame and was able to mimic speech.
Newton's parakeet was first written about by the French Huguenot François Leguat in 1708 and was only mentioned a few times by other writers afterwards. The specific name "exsul" is a reference to Leguat, who was exiled from France. Only two life drawings exist, both of a single specimen held in captivity in the 1770s. The species was scientifically described in 1872, with a female specimen as the holotype. A male, the last specimen recorded, was collected in 1875, and these two specimens are the only ones that exist today. The bird became scarce due to deforestation and perhaps hunting, but it was thought to have been finally wiped out by a series of cyclones and storms that hit Rodrigues in the late 19th century. Speculation about the possible survival of the species, though unfounded, lasted as late as 1967. (Full article...)
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Selected general bird topic
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The wingspan (or just span) of a bird or an airplane is the distance from one wingtip to the opposite wingtip. For example, the Boeing 777–200 has a wingspan of 60.93 metres (199 ft 11 in), and a wandering albatross (Diomedea exulans) caught in 1965 had a wingspan of 3.63 metres (11 ft 11 in), the official record for a living bird. The term wingspan, more technically extent, is also used for other winged animals such as pterosaurs, bats, insects, etc., and other aircraft such as ornithopters. In humans, the term wingspan also refers to the arm span, which is the distance between the length from the end of an individual's arm (measured at the fingertips) to the individual's fingertips on the other arm when raised parallel to the ground at shoulder height. (Full article...)
Selected taxon
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The indigobirds, whydahs and cuckoo-finch make up the family Viduidae; they are small passerine birds native to Africa.
These are finch-like species which usually have black or indigo predominating in their plumage. The birds named "whydahs" have long or very long tails in the breeding male.
All are obligate brood parasites, which lay their eggs in the nests of songbird species; most indigobirds use firefinches as hosts, whereas the paradise whydahs choose pytilias and the cuckoo-finch parasitises cisticolids. Unlike the cuckoos and honeyguides, the indigobirds and whydahs do not destroy the host's eggs. Typically, they lay 2–4 eggs in with those already present. The eggs of both the host and the victim are white, although the indigobird's are slightly larger. Many of the indigo-plumaged species named "indigobirds" are very similar in appearance, with the males difficult to separate in the field, and the young and females near impossible. The best guide is often the estrildid finch with which they are associating, since each indigobird parasitises a different host species. For example, the village indigobird is usually found with red-billed firefinches. Indigobirds and whydahs imitate their host's song, which the males learn in the nest. Although females do not sing, they also learn to recognise the song, and choose males with the same song, thus perpetuating the link between each species of indigobird and firefinch. The nestling indigobirds mimic the unique gape pattern of the fledglings of the host species. (Full article...)
Topics
Anatomy: Anatomy • Skeleton • Flight • Eggs • Feathers • Plumage
Evolution and extinction: Evolution • Archaeopteryx • Hybridisation • Late Quaternary prehistoric birds • Fossils • Taxonomy • Extinction
Behaviour: Singing • Intelligence • Migration • Reproduction • Nesting • Incubation • Brood parasites
Bird orders: Struthioniformes • Tinamiformes • Anseriformes • Accipitriformes • Galliformes • Gaviiformes • Podicipediformes • Procellariiformes • Sphenisciformes • Pelecaniformes • Ciconiiformes • Phoenicopteriformes • Falconiformes • Gruiformes • Charadriiformes • Pteroclidiformes • Columbiformes • Psittaciformes • Cuculiformes • Strigiformes • Caprimulgiformes • Apodiformes • Coraciiformes • Piciformes • Trogoniformes • Coliiformes • Passeriformes
Bird lists: Families and orders • Lists by region
Birds and humans: Ringing • Ornithology • Bird collections • Birdwatching • Birdfeeding • Conservation • Aviculture
Quotes
| “ | Does wisdom perhaps appear on the earth as a raven which is inspired by the smell of carrion? | ” |
Resources
Free online resources:
- SORA: The Searchable Online Research Archive (SORA) has decades worth of archives of the following journals: The Auk, The Condor, Journal of Field Ornithology, North American Bird Bander, Studies in Avian Biology, Pacific Coast Avifauna, and The Wilson Bulletin. Coverage ends around 2000. The ability to search all journals or browse exists on the front page.
- Notornis: The Journal of the Ornithological Society of New Zealand covers New Zealand and the South Pacific.
- New Zealand Journal of Ecology: This journal often publishes bird-related articles. Like Notornis, this journal is concerned with New Zealand and surrounding areas.
- Marine Ornithology: Published by the numerous seabird research groups, Marine Ornithology is specific and goes back many years.
- BirdLife International: The Data Zone has species accounts for every species, although threatened species and some key groups have greater detail with others only having status and evaluation.
- Author Index: This is a good source for binomial authorities for taxoboxes.
There is also Birds of North America, Cornell University's massive project collecting information on every breeding bird in the ABA area. It is available for US$40 a year.
For more sources, including printed sources, see WikiProject Birds.
WikiProjects
Selected images
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A Beautiful Firetail (Stagonopleura bella) male (top) and female. In this common Australian species of estrildid finch, nest-building and raising children is done collaboratively. -
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Photograph credit: John HarrisonThe Campbell albatross (Thalassarche impavida) is a medium-sized mollymawk in the albatross family, Diomedeidae. It breeds only on Campbell Island / Motu Ihupuku and the associated islet of Jeanette Marie, in an uninhabited subantarctic island group of New Zealand located in the South Pacific. Because of its restricted breeding range, the bird is considered to be a vulnerable species by the International Union for Conservation of Nature. The greatest threat it faces is from the fishing industry. This Campbell albatross in flight was photographed off the south-eastern coast of Tasmania, Australia. -
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Photograph: JJ HarrisonThe noisy miner (Manorina melanocephala) is a bird in the honeyeater family endemic to eastern and south-eastern Australia and feeds mostly nectar, fruit and insects. This highly vocal species has a large range of songs, calls, scoldings and alarms, lives in large groups, and is territorial. Populations have grown in numerous places along this miner's range, and as such there is now an overabundance. -
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The Pine Siskin (Carduelis pinus) is a finch native to northern North America. The plumage is drab, being brown on the upperparts and pale on the underparts, with heavy streaking throughout. They have yellow patches in their wings and tail, which are not always visible. They grow to 11–14 cm (4.3–5.5 in) in length and typically weigh 12–18 g (0.4–0.6 oz). -
Photo: JJ HarrisonThe Pied Heron (Ardea picata), also known as the Pied Egret, is a heron found in coastal and subcoastal areas of monsoonal northern Australia as well as some parts of Wallacea and New Guinea. It grows to 43–55 cm (17–22 in) long, with dark slate grey wings, body, and crested head, with a white throat and neck. The weight ranges from 225 to 280 g (8 to 10 oz), with males being heavier than females. -
Canada goose -
Bald eagle at Bird of prey -
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Photograph: JJ HarrisonThe Dusky Myzomela (Myzomela obscura) is a species of bird in the honeyeater family which lives in various habitats in Oceania and the Malay archipelago. Feeding on insects and nectar, these birds may be sedentary or migrant, depending on the habitat in which they live. -
The prothonotary warbler (Protonotaria citrea) is a small songbird of the New World warbler family. It breeds in hardwood swamps in southern Canada and the eastern United States and winters in the West Indies, Central America and northern South America. -
Photo: Wagner Machado Carlos LemesThe Roadside Hawk (Buteo magnirostris) is a relatively small bird of prey. Specimens normally range from 31 to 41 centimetres (12 to 16 in) in length and weigh 250–300 grams (8.8–10.6 oz). The Roadside Hawk is common throughout its range: from Mexico through Central America to most of South America east of the Andes. It is well adapted to most ecosystems in its range, and can also be found in urban areas. Its diet consists mainly of insects, squamates, and small mammals, such as young common marmosets and similarly sized monkeys. -
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The Willet (Tringa semipalmata) is a large shorebird in the sandpiper family. Adults have gray legs and a long, straight, dark and stout bill. The body is dark gray above and light underneath. The tail is white with a dark band at the end. The distinctive black and white pattern of the wings is a common sight along many North American coastal beaches. -
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Malurus cyaneus cyanochlamys, juvenile -
Photo credit: MdfThe Red-necked Grebe (Podiceps grisegena) is a member of the grebe family of water birds. In summertime, adults are unmistakable, due to their red neck and white throat. In winter, the Red-necked Grebe is duskier than most grebes, with no white above the eye, and a thick, yellowish bill. It is a somewhat large grebe, about the same size as an average duck. -
Photo: JJ HarrisonThe Dusky Robin (Melanodryas vittata) is a small passerine bird native to Tasmania. A member of the Australian Robin family, it is not related to European or American Robins. It is a brown-plumaged bird of open woodland, measuring 16–17 cm (6.3–6.7 in) in length. -
Photograph credit: Charles James SharpThe village weaver (Ploceus cucullatus) is a species of bird in the family Ploceidae, found in much of sub-Saharan Africa. This often abundant species occurs in a wide range of open or semi-open habitats, and frequently forms large, noisy colonies in towns, villages and hotel grounds. This male, of the subspecies P. c. bohndorffi, was photographed building a nest in Queen Elizabeth National Park, Uganda. Male birds make elaborate nests, each incorporating about 300 strips of palm or grass leaves that they have torn off the plant and transported individually. These are woven together to form roofed, dangling structures with the entrance at the bottom. The only involvement of the female is in the creation of the lining of the egg-laying cup. -
Photograph: JJ HarrisonThe black-naped monarch (Hypothymis azurea) is a slim and agile passerine bird belonging to the family of monarch flycatchers. They are sexually dimorphic: males have a distinctive black patch on the back of the head and a narrow black half collar ("necklace") while females are duller and lack the black markings. Their call is similar to that of the Asian paradise flycatcher. In tropical forest habitats, pairs may join mixed-species foraging flocks. Populations differ slightly in size and plumage colour. -
Photo credit: K.-M. HanscheThe Tawny Owl (Strix aluco) is a species of owl resident in much of Europe and southern Russia. It is a medium-sized earless owl, 37-43 cm in length with an 81-96 cm wingspan. The Tawny Owl is stocky with a large rounded head and rounded wings. This species probably injures more people than any other European bird. It is fearless in defence of its nest and young, and strikes for the intruder's face with its sharp talons. Since its flight is silent, at night in particular it may not be detected until too late. -
Chinese goose head at List of goose breeds -
A House Sparrow, a "true sparrow" of the family Passeridae, as opposed to American sparrows. There are other birds, such as the Dunnock, also known as a Hedge Sparrow — a relic of the old practice of calling any small bird a "sparrow". There are 35 species of Old World sparrows, in four genera. -
Image credit: John James AudubonA hand-colored engraving of the Ivory-billed Woodpecker (Campephilus principalis), a very large member of the woodpecker family Picidae native to the Southern United States. This species is officially listed as an endangered species, but by the end of the 20th century had widely been considered extinct. Sightings in Arkansas in 2004 and 2005 were followed by evidence for existence in Florida in 2006, but conclusive evidence of a population of Ivory-billed Woodpeckers, in the form of unambiguous photographs/videos, specimens, or DNA from feathers, has not been forthcoming. -
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Female mallard and ducklings at Burnaby Lake Regional Park
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Selected bird anatomy topic
Wing chord is an anatomical measurement of a bird's wing. The measurement is taken with the wing bent at a 90-degree angle, from the most prominent point of the wrist joint to the most prominent point of the longest primary feather. It is often taken as a standard measurement of the proportions of a bird and used to differentiate between species and subspecies. (Full article...)
Selected species
Did you know
- ...that the hood mockingbird will occasionally attack people in an attempt to get fresh water from them?
- ...that prior to the development of binoculars, bird collections, collections consisting of birds and parts of their anatomy, were the dominant method of bird observation and study among ornithologists?
- ...that bird nests range in size from the tiny one inch high cup of some hummingbirds to the massive five meter high mounds of some dusky scrubfowl?
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Taxonomy of Aves
| Class Aves, divided into superorders, orders, suborders (where indicated), and families. | ||||
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Associated Wikimedia
The following Wikimedia Foundation sister projects provide more on this subject:
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Commons
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Wikibooks
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Wikidata
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Wikinews
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Wikiquote
Collection of quotations -
Wikisource
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Wikispecies
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Wiktionary
Dictionary and thesaurus
Sources
- ^ Commons, T.K. (2012). Instant Genius: Smart Mouths: The Best Quotations Ever Collected. Portable Press. p. pt56. ISBN 978-1-60710-684-5. Retrieved February 7, 2020.
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