Portal:Birds

The Birds Portal

Birds are a group of warm-blooded vertebrates constituting the class Aves (/ˈeɪviːz/), 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, more than half of which 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 recent estimates, modern birds (Neornithes) evolved in the Late Cretaceous and diversified dramatically around the time of the Cretaceous–Paleogene extinction event 66 million years ago, which killed off the pterosaurs and all non-avian dinosaurs.

Many social species pass on knowledge across generations, which is considered a form of culture. Birds are social, communicating with visual signals, calls, and songs, and participating in such behaviours 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...)

Featured articles

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  Holotype left tibiotarsus in two views

  
  The St. Croix macaw (Ara autocthones) or Puerto Rican macaw is an extinct species of macaw whose remains have been found on the Caribbean islands of St. Croix and Puerto Rico. It was described in 1937 based on a tibiotarsus leg bone unearthed from a kitchen midden at a pre-Columbian site on St. Croix. A second specimen consisting of various bones from a similar site on Puerto Rico was described in 2008, while a coracoid from Montserrat may belong to this or another extinct species of macaw. The St. Croix macaw is one of 13 extinct macaw species that have been proposed to have lived on the Caribbean islands. Macaws were frequently transported long distances by humans in prehistoric and historical times, so it is impossible to know whether species known only from bones or accounts were native or imported.
  
  As it is only known from bones, the St. Croix macaw's color is not known. Extant macaws can generally be grouped in either large-body or small-body size clusters. Yet, the bones of the St. Croix macaw are intermediate in size between the two, and it was slightly larger than the extinct Cuban macaw (Ara tricolor). Only the blue-throated macaw (Ara glaucogularis) and Lear's macaw (Anodorhynchus leari) are similar in size. It differed from other macaws in various skeletal details and shared several features with only the genus Ara. Like other macaw species in the Caribbean, the St. Croix macaw is believed to have been driven to extinction by humans, as indicated by the fact that its remains were found in kitchen middens. (Full article...)
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  Male at Head Marala, Punjab, Pakistan
  

  
  The Sind sparrow (Passer pyrrhonotus) is a passerine bird of the sparrow family, Passeridae, found around the Indus valley region in South Asia specially Sindh. 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...)
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  Adults with a chick on Snow Hill Island, Antarctic Peninsula

  
  The emperor penguin (Aptenodytes forsteri) is the tallest and heaviest of all living penguin species and is endemic to Antarctica. The male and female are similar in plumage and size, reaching 100 cm (39 in) in length and weighing from 22 to 45 kg (49 to 99 lb). Feathers of the head and back are black and sharply delineated from the white belly, pale-yellow breast and bright-yellow ear patches.
  
  Like all penguins, it is flightless, with a streamlined body, and wings stiffened and flattened into flippers for a marine habitat. Its diet consists primarily of fish, but also includes crustaceans, such as krill, and cephalopods, such as squid. While hunting, the species can remain submerged around 20 minutes, diving to a depth of 535 m (1,755 ft). It has several adaptations to facilitate this, including an unusually structured haemoglobin to allow it to function at low oxygen levels, solid bones to reduce barotrauma, and the ability to reduce its metabolism and shut down non-essential organ functions.
  
  The only penguin species that breeds during the Antarctic winter, emperor penguins trek 50–120 km (31–75 mi) over the ice to breeding colonies which can contain up to several thousand individuals. The female lays a single egg, which is incubated for just over two months by the male while the female returns to the sea to feed; parents subsequently take turns foraging at sea and caring for their chick in the colony. The lifespan is typically 20 years in the wild, although observations suggest that some individuals may live to 50 years of age. (Full article...)
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  Freshwater lagoon seen from west bank, with Island Hide in the foreground, and the Parrinder wall and hides further back

  
  Titchwell Marsh is an English nature reserve owned and managed by the Royal Society for the Protection of Birds (RSPB). Located on the north coast of the county of Norfolk, between the villages of Titchwell and Thornham, about 8 km (5.0 mi) east of the seaside resort of Hunstanton, its 171 hectares (420 acres) include reed beds, saltmarshes, a freshwater lagoon and sandy beach, with a small woodland area near the car park. This internationally important reserve is part of the North Norfolk Coast Site of Special Scientific Interest (SSSI) and the Norfolk Coast Area of Outstanding Natural Beauty (AONB), and is also protected through Natura 2000, Special Protection Area (SPA) and Ramsar listings.
  
  The reserve is important for some scarce breeding birds, such as pied avocets on the islands, and western marsh harriers, Eurasian bitterns and bearded reedlings in the reeds. To encourage bitterns to breed, the reed beds have been improved to make them wetter, and the lagoon has been stocked with the common rudd. Typical wetland birds such as the water rail, reed warbler and sedge warbler also appear, and little egrets are common. The reserve has regularly attracted rarities, as its location is important for migrating birds. Ducks and geese winter at Titchwell in considerable numbers, and the reserve shelters the endangered European water vole.
  
  Facilities include three bird hides, a seawatching platform, two nature trails, and a visitor centre. Because of concerns about climate change, a major project in 2010 and 2011 brought improvements to the banks around the freshwater lagoon and the conversion of the brackish lagoon to tidal saltmarsh, a more effective barrier to encroachment by the sea. (Full article...)
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  Du Tertre's 1667 illustration showing three Guadeloupe amazons (8) and one Lesser Antillean macaw (7) on a tree at the left

  
  The Guadeloupe amazon or Guadeloupe parrot (Amazona violacea) is a hypothetical extinct species of parrot that is thought to have been endemic to the Lesser Antillean island region of Guadeloupe. Mentioned and described by 17th- and 18th-century writers, it received a scientific name in 1789. It was moved to the genus Amazona in 1905, and is thought to have been related to, or possibly the same as, the extant imperial amazon. A tibiotarsus and an ulna bone from the island of Marie-Galante may belong to the Guadeloupe amazon. In 1905, a species of extinct violet macaw was also claimed to have lived on Guadeloupe, but in 2015, it was suggested to have been based on a description of the Guadeloupe amazon.
  
  According to contemporary descriptions, the head, neck and underparts of the Guadeloupe amazon were mainly violet or slate, mixed with green and black; the back was brownish green; and the wings were green, yellow and red. It had iridescent feathers, and was able to raise a "ruff" of feathers around its neck. The bird fed on fruits and nuts, and the male and female took turns sitting on the nest. It was eaten by French settlers, who also destroyed its habitat. Rare by 1779, it appears to have become extinct by the end of the 18th century. (Full article...)
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  Black currawong, Tasmania

  
  The black currawong (Strepera fuliginosa), also known locally as the black jay, is a large passerine bird endemic to Tasmania and the nearby islands within the Bass Strait. One of three currawong species in the genus Strepera, it is closely related to the butcherbirds and Australian magpie within the family Artamidae. It is a large crow-like bird, around 50 cm (20 in) long on average, with yellow irises, a heavy bill, and black plumage with white wing patches. The male and female are similar in appearance. Three subspecies are recognised, one of which, Strepera fuliginosa colei of King Island, is vulnerable to extinction.
  
  Within its range, the black currawong is generally sedentary, although populations at higher altitudes relocate to lower areas during the cooler months. The habitat includes densely forested areas as well as alpine heathland. It is rare below altitudes of 200 m (660 ft). Omnivorous, its diet includes a variety of berries, invertebrates, and small vertebrates. Less arboreal than the pied currawong, the black currawong spends more time foraging on the ground. It roosts and breeds in trees. (Full article...)
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  Illustration from 1861 Ibis article.

  
  The African river martin (Pseudochelidon eurystomina) is a passerine bird, one of two members of the river martin subfamily of the swallow family, Hirundinidae. When discovered, it was not initially recognised as a swallow, and its structural differences from most of its relatives, including its stout bill and robust legs and feet, have led to its current placement in a separate subfamily shared only with the Asian white-eyed river martin. The African river martin is a large swallow, mainly black with a blue-green gloss to the head and a greener tint to the back and wings. The under-wings are brownish, the underparts are purple-black, and the flight feathers are black. This martin has red eyes, a broad orange-red bill and a black, square tail. Young birds are similar in appearance to the adults, but have browner plumage. This species has a variety of unmusical calls, and displays both in flight and on the ground, although the purpose of the terrestrial display is unknown.
  
  The main breeding areas are in the Democratic Republic of the Congo (DRC) along the Congo River and its tributary, the Ubangi, in habitats characterised by a mixture of tropical forest types including swampy or seasonally flooded woodland. The African river martin is migratory, wintering in coastal savanna in southern Gabon and the Republic of the Congo. Breeding also occurs in these coastal areas, but it is unknown whether the migrants are raising a second brood or if there is a separate resident population. This martin feeds in flocks throughout the year, catching a variety of insects in the air, especially flying ants. It does not use perches during the breeding season, although it will often land on the ground.
  
  The African river martin nests in burrows in river sand banks, often alongside rosy bee-eaters, but its incubation and fledging times are not known. It also digs tunnels for night-time shelter when in its wintering areas. It appears to be common within its restricted range, despite being caught in large numbers by the local population for food, and large flocks are sometimes seen. However, due to a lack of detailed information about its breeding range and population numbers, this species is classed as Data Deficient by the International Union for Conservation of Nature (IUCN). (Full article...)
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  Male T. t. torquatus in Spain

  
  The ring ouzel (Turdus torquatus) is a mainly European member of the thrush family Turdidae. It is a medium-sized thrush, 23–24 centimetres (9.1–9.4 in) in length and weighing 90–138 grams (3.2–4.9 oz). The male is predominantly black with a conspicuous white crescent across its breast. Females are browner and duller than males, and young birds may lack the pale chest markings altogether. In all but the northernmost part of its range, this is a high-altitude species, with three races breeding in mountains from Ireland east to Iran. It breeds in open mountain areas with some trees or shrubs, the latter often including heather, conifers, beech, hairy alpenrose or juniper. It is a migratory bird, leaving the breeding areas to winter in southern Europe, North Africa and Turkey, typically in mountains with juniper bushes. The typical clutch is 3–6 brown-flecked pale blue or greenish-blue eggs. They are incubated almost entirely by the female, with hatching normally occurring after 13 days. The altricial, downy chicks fledge in another 14 days and are dependent on their parents for about 12 days after fledging.
  
  The ring ouzel is omnivorous, eating invertebrates, particularly insects and earthworms, some small vertebrates, and a wide range of fruit. Most animal prey is caught on the ground. During spring migration and the breeding season, invertebrates dominate the adult's diet and are also fed to the chicks. Later in the year, fruit becomes more important, particularly the common juniper.
  
  With an extensive range and a large population, the ring ouzel is evaluated as least concern by the International Union for Conservation of Nature (IUCN). There are signs of decline in several countries; suspected causes including climate change, human disturbance, hunting and outdoor leisure activities. Loss of junipers may also be a factor in some areas. Natural hazards include predation by mammalian carnivores and birds of prey, and locally there may also be competition from other large thrushes such as the common blackbird, mistle thrush and fieldfare. (Full article...)
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  The hooded pitohui (Pitohui dichrous) is a species of bird in the genus Pitohui found in New Guinea. It was long thought to be a whistler (Pachycephalidae) but is now known to be in the Old World oriole family (Oriolidae). Within the oriole family, this species is most closely related to the variable pitohuis in the genus Pitohui, and then the figbirds.
  
  A medium-sized songbird with reddish-brown and black plumage, this species is one of the few known poisonous birds, containing a range of batrachotoxin compounds in its skin, feathers and other tissues. These toxins are thought to be derived from their diet and may function both to deter predators and to protect the bird from parasites. The close resemblance of this species to other unrelated birds also known as pitohuis which are also poisonous is an example of convergent evolution and Müllerian mimicry. Their appearance is also mimicked by unrelated non-poisonous species, a phenomenon known as Batesian mimicry. The toxic nature of this bird is well known to local hunters, who avoid it. It is one of the most poisonous species of pitohui, but the toxicity of individual birds can vary geographically.
  
  The hooded pitohui is found in forests from sea level up to 2,000 m (6,600 ft) but is most common in hills and low mountains. A social bird, it lives in family groups and frequently joins and even leads mixed-species foraging flocks. Its diet is made up of fruits, seeds and invertebrates. This species is apparently a cooperative breeder, with family groups helping to protect the nest and feed the young. The hooded pitohui is common and is currently not at risk of extinction, with its numbers being stable. (Full article...)
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  The letter-winged kite (Elanus scriptus) is a small, rare and irruptive bird of prey that is found only in Australia. Measuring around 35 cm (14 in) in length with a wingspan of 84–100 cm (33–39 in), the adult letter-winged kite has predominantly pale grey and white plumage and prominent black rings around its red eyes. Its name derives from its highly distinctive black underwing pattern of a shallow 'M' or 'W' shape, visible when in flight. This distinguishes it from the otherwise similar black-shouldered kite. This species is also the only nocturnal species within the order Accipitriformes despite few differences found in its visual anatomy to other closely related kites.
  
  The species begins breeding in response to rodent outbreaks, with pairs nesting in loose colonies of up to 50 birds each. Three to four eggs are laid and incubated for around thirty days, though the eggs may be abandoned if the food source disappears. Chicks are fledged within five weeks of hatching. Roosting in well-foliaged trees during the day, the letter-winged kite hunts mostly at night. It is a specialist predator of rodents, which it hunts by hovering above grasslands and fields. It is rated as near threatened on the International Union for Conservation of Nature (IUCN)'s Red List of Threatened Species. (Full article...)
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  Male

  
  The American goldfinch (Spinus tristis) is a small North American bird in the finch family. It is migratory, ranging from mid-Alberta to North Carolina during the breeding season, and from just south of the Canada–United States border to Mexico during the winter.
  
  The only finch in its subfamily to undergo a complete molt, the American goldfinch displays sexual dichromatism: the male is a vibrant yellow in the summer and an olive color during the winter, while the female is a dull yellow-brown shade which brightens only slightly during the summer. The male displays brightly colored plumage during the breeding season to attract a mate.
  
  The American goldfinch is a granivore and adapted for the consumption of seedheads, with a conical beak to remove the seeds and agile feet to grip the stems of seedheads while feeding. It is a social bird and will gather in large flocks while feeding and migrating. It may behave territorially during nest construction, but this aggression is short-lived. Its breeding season is tied to the peak of food supply, beginning in late July, which is relatively late in the year for a finch. This species is generally monogamous and produces one brood each year. (Full article...)
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  From The Birds of Celebes and the neighbouring islands, 1898

  
  The snoring rail (Aramidopsis plateni), also known as the Celebes rail or Platen's rail, is a large flightless rail and the only member of the genus Aramidopsis. The species is endemic to Indonesia, and it is found exclusively in dense vegetation in wet areas of Sulawesi and nearby Buton. The rail has grey underparts, a white chin, brown wings and a rufous patch on the hind-neck. The sexes are similar, but the female has a brighter neck patch and a differently coloured bill and iris. The typical call is the snoring: ee-orrrr sound that gives the bird its English name.
  
  Its inaccessible habitat and retiring nature mean that the snoring rail is rarely seen and as a result, little is known of its behaviour. Only the adult plumage has been described, and the breeding behaviour is unrecorded. It feeds on small crabs and probably other small prey such as lizards. Although protected under Indonesian law since 1972, the rail is threatened by habitat loss (even within nature reserves), hunting for food and predation by introduced species; it is therefore evaluated as vulnerable on the IUCN Red List. (Full article...)
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  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...)
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  Grey morph individual

  
  The tawny owl (Strix aluco), also called the brown owl, is commonly found in woodlands across Europe to western Siberia, and has seven recognized subspecies. It is a stocky, medium-sized owl, whose underparts are pale with dark streaks, and whose upper body may be either brown or grey (in several subspecies, individuals may be of either color). The tawny owl typically makes its nest in a tree hole where it can protect its eggs and young against potential predators. It is non-migratory and highly territorial: as a result, when young birds grow up and leave the parental nest, if they cannot find a vacant territory to claim as their own, they will often starve.
  
  The tawny owl is a nocturnal bird of prey. It is able to hunt successfully at night because of its vision and hearing adaptations and its ability to fly silently. It usually hunts by dropping suddenly from a perch and seizing its prey, which it swallows whole. It hunts mainly rodents, although in urbanized areas its diet includes a higher proportion of birds. It also sometimes catches smaller owls, and is itself sometimes hunted by the eagle owl and the Eurasian goshawk.
  
  Its retina is no more sensitive than a human's. Its directional hearing skill is more important to its hunting success: its ears are asymmetrically placed, which enables it to more precisely pinpoint the location from which a sound originates. (Full article...)
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  1708 drawing by François Leguat, the only known illustration of this species by someone who observed it alive

  
  The Rodrigues solitaire (Pezophaps solitaria) is an extinct flightless bird that was endemic to the island of Rodrigues, east of Madagascar in the Indian Ocean. Genetically within the family of pigeons and doves, it was most closely related to the also extinct dodo of the nearby island Mauritius, the two forming the subfamily Raphinae. The Nicobar pigeon is their closest living genetic relative.
  
  Rodrigues solitaires grew to the size of swans, and demonstrated pronounced sexual dimorphism. Males were much larger than females and measured up to 75.7–90 centimetres (30–35 inches) in height and 28 kilograms (62 pounds) in weight, contrasting with 63.8–70 centimetres (25–28 in) and 17 kilograms (37 lb) for females. Its plumage was grey and brown; the female was paler than the male. It had a black band at the base of its slightly hooked beak, and its neck and legs were long. Both sexes were highly territorial, with large bony knobs on their wings that were used in combat. The Rodrigues solitaire laid a single egg that was incubated in turn by both sexes. Gizzard stones helped digest its food, which included fruit and seeds.
  
  First mentioned during the 17th century, the Rodrigues solitaire was described in detail by François Leguat, the leader of a group of French Huguenot refugees who were marooned on Rodrigues in 1691–1693. It was hunted by humans and introduced animals, and was extinct by the late 18th century. Apart from Leguat's account and drawing, and a few other contemporary descriptions, nothing was known about the bird until a few subfossil bones were found in a cave in 1786. Thousands of bones have subsequently been excavated. It is the only extinct bird with a former constellation named after it, Turdus Solitarius. (Full article...)
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  C. a. brasiliensis
  Peten, Guatemala

  
  The black vulture (Coragyps atratus), also known as the American black vulture, Mexican vulture, zopilote, urubu, or gallinazo, is a bird in the New World vulture family whose range extends from the southeastern United States to Perú, Central Chile and Uruguay in South America. Although a common and widespread species, it has a somewhat more restricted distribution than its compatriot, the turkey vulture, which breeds well into Canada and all the way south to Tierra del Fuego. It is the only extant member of the genus Coragyps, which is in the family Cathartidae. Despite the similar name and appearance, this species is not closely related to the Eurasian black vulture, an Old World vulture, of the family Accipitridae (which includes raptors like the eagles, hawks, kites, and harriers). For ease of locating animal corpses (their main source of sustenance), black vultures tend to inhabit relatively open areas with scattered trees, such as chaparral, in addition to subtropical forested areas and parts of the Brazilian pantanal.
  
  With a wingspan of 1.5 m (4.9 ft), the black vulture is an imposing bird, though relatively small for a vulture, let alone a raptor. It has black plumage, a featherless, grayish-black head and neck, and a short, hooked beak. These features are all evolutionary adaptations to life as a scavenger; their black plumage stays visibly cleaner than that of a lighter-colored bird, the bare head is designed for easily digging inside animal carcasses, and the hooked beak is built for stripping the bodies clean of meat. The absence of head-feathers helps the birds stay clean and remain (more or less) free of animal blood and bodily fluids, which could become problematic for the vultures and attract parasites; most vultures are known to bathe after eating, provided there is a water source. This water source can be natural or man-made, such as a stream or a livestock water tank.
  
  The black vulture is a scavenger and feeds on carrion, but will also eat eggs, small reptiles, or small newborn animals (livestock such as cattle, or deer, rodents, rabbits, etc.), albeit very rarely. They will also opportunistically prey on extremely weakened, sick, elderly, or otherwise vulnerable animals. In areas populated by humans, it also scavenges at dumpster sites and garbage dumps. It finds its meals either by using its keen eyesight or by following other (New World) vultures, which all possess a keen sense of smell. Lacking a syrinx—the vocal organ of birds—its only vocalizations are grunts or low hisses. It lays its eggs in caves, in cliffside rock crevasses, dead and hollow trees or, in the absence of predators, on the bare ground, generally raising two chicks each year. The parents feed their young by regurgitation from their crop, an additional digestive organ unique to birds, used for storing excess food; their “infant formula”, of sorts, is thus called “crop milk”. In the United States, the vulture receives legal protection under the Migratory Bird Treaty Act of 1918 despite the fact it does not migrate whatsoever. This vulture also appeared in Mayan codices. (Full article...)
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  The water rail (Rallus aquaticus) is a bird of the rail family which breeds in well-vegetated wetlands across Europe, Asia and North Africa. Northern and eastern populations are migratory, but this species is a permanent resident in the warmer parts of its breeding range. The adult is 23–28 cm (9–11 in) long, and, like other rails, has a body that is flattened laterally, allowing it easier passage through the reed beds it inhabits. It has mainly brown upperparts and blue-grey underparts, black barring on the flanks, long toes, a short tail and a long reddish bill. Immature birds are generally similar in appearance to the adults, but the blue-grey in the plumage is replaced by buff. The downy chicks are black, as with all rails. The former subspecies R. indicus, has distinctive markings and a call that is very different from the pig-like squeal of the western races, and is now usually split as a separate species, the brown-cheeked rail.
  
  The water rail breeds in reed beds and other marshy sites with tall, dense vegetation, building its nest a little above the water level from whatever plants are available nearby. The off-white, blotched eggs are incubated mainly by the female, and the precocial downy chicks hatch in 19–22 days. The female will defend her eggs and brood against intruders, or move them to another location if they are discovered. This species can breed after its first year, and it normally raises two clutches in each season. Water rails are omnivorous, feeding mainly on invertebrates during summer and berries or plant stems towards winter. They are territorial even after breeding, and will aggressively defend feeding areas in winter.
  
  These rails are vulnerable to flooding or freezing conditions, loss of habitat and predation by mammals and large birds. The introduced American mink has exterminated some island populations, but overall the species' huge range and large numbers mean that it is not considered to be threatened. (Full article...)
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  The flame robin (Petroica phoenicea) is a small passerine bird native to Australia. It is a moderately common resident of the coolest parts of south-eastern Australia, including Tasmania. Like the other two red-breasted Petroica robins—the scarlet robin and the red-capped robin—it is often simply called the robin redbreast. Like many brightly coloured robins of the Petroicidae, it is sexually dimorphic. Measuring 12–14 cm (4.7–5.5 in) long, the flame robin has dark brown eyes and a small thin black bill. The male has a brilliant orange-red chest and throat, and a white patch on the forehead above the bill. Its upper parts are iron-grey with white bars, and its tail black with white tips. Female coloration is a muted grey-brown. Its song has been described as the most musical of its genus.
  
  The position of the flame robin and its Australian relatives on the passerine family tree is unclear; the Petroicidae are not closely related to either the European or American robins, but appear to be an early offshoot of the Passerida group of songbirds. The flame robin is predominantly insectivorous, pouncing on prey from a perch in a tree, or foraging on the ground. A territorial bird, the flame robin employs song and plumage displays to mark out and defend its territory. It is classified by BirdLife International as least concern. (Full article...)
• 

  

  
  The Siberian accentor (Prunella montanella) is a small passerine bird that breeds in northern Russia from the Ural Mountains eastwards across Siberia. It is migratory, wintering in Korea and eastern China, with rare occurrences in western Europe and northwestern North America. Its typical breeding habitat is subarctic deciduous forests and open coniferous woodland, often close to water, although it also occurs in mountains and spruce taiga. It inhabits bushes and shrubs in winter, frequently near streams, but may also be found in dry grassland and woods.
  
  The Siberian accentor has brown upperparts and wings, with bright chestnut streaking on its back and a greyish-brown rump and tail. The head has a dark brown crown and a long, wide pale yellow supercilium ("eyebrow"). All plumages are quite similar. The nest is an open cup in dense shrub or a tree into which the female lays four to six glossy deep blue-green eggs that hatch in about ten days. Adults and chicks feed mainly on insects, typically picked off the ground, but sometimes taken from vegetation. In winter, the accentors may also consume seeds or feed near human habitation.
  
  Breeding over a huge area, the Siberian accentor has a large and stable population. It is therefore evaluated as a species of least concern by the International Union for Conservation of Nature (IUCN), although, as a northern breeding species, it may be affected by climate change in the long term. October and November 2016 saw an unprecedented influx of this species into western Europe, reaching as far as the United Kingdom. (Full article...)
• 
  
  

  

  Jynx ruficollis ruficollis in South Africa

  
  The red-throated wryneck (Jynx ruficollis), also known as the rufous-necked wryneck or red-breasted wryneck, is a species of wryneck in the woodpecker family closely related to the Eurasian wryneck. Its three subspecies are resident in much of sub-Saharan Africa in open habitats with some trees. It is a slim, elongated bird about 19 cm (7.5 in) in length, with a small head, fine bill, long fan-shaped tail and cryptic plumage intricately patterned in greys and browns. The sexes look similar, although males are slightly larger. The diet of the adults and young is almost entirely ants at all stages of their life cycles. The call of the red-throated wryneck is a series of repeated harsh, shrill notes. When threatened, a bird will twist its neck and head in a snake-like manner while making a hissing sound, presumably to deter predators.
  
  The red-throated wryneck nests in pre-existing holes, usually in trees, preferring old barbet or woodpecker nests. The unlined nest cavity is usually 3–4 m (10–13 ft) above the ground, and the clutch is typically three or four white eggs, laid at one-day intervals. Both sexes incubate the eggs for 12–15 days until the blind, naked chicks hatch. The chicks are fed by both adults for 25–26 days until they fledge. There are usually two broods. The red-throated wryneck has a very extensive range, and its population is large and increasing. For this reason, it is evaluated as a species of least concern by the International Union for Conservation of Nature (IUCN). (Full article...)

Selected general bird topic

Sign marking the borders of the bird reserve at Ågestasjön, Sweden

A bird reserve (also called ornithological reserve) is a wildlife refuge designed to protect bird species. Like other wildlife refuges, the main goal of a reserve is to prevent species from becoming endangered or extinct. Typically, bird species in a reserve are protected from hunting and habitat destruction. Because of the protection they provide from such threats, bird reserves also serve as excellent locations for bird watching. Normally, wildlife refuges are under the care of non-profit organizations and governmental institutions. (Full article...)

Selected taxon

Kori bustard

Bustards, including floricans and korhaans, are large, terrestrial birds living mainly in dry grassland areas and on the steppes of the Old World. They range in length from 40 to 150 cm (16 to 59 in). They make up the family Otididae (/oʊˈtɪdɪdiː/, formerly known as Otidae).

Bustards are omnivorous and opportunistic, eating leaves, buds, seeds, fruit, small vertebrates, and invertebrates. There are 26 species currently recognised. (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

“ When thou seest an eagle, thou seest a portion of genius; lift up thy head! ”

--William Blake,

...All quotes

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

• WikiProject Birds
• WikiProject Science
• WikiProject History of Science
• WikiProject Tree of Life
• WikiProject Biology
• WikiProject Ecology
• WikiProject Extinction

Selected images

• 
  Rock Pigeon

  Photo credit: Alan D. Wilson

  A male Rock Pigeon (Columba livia) in flight. This species of pigeon, native to western and southern Europe and North Africa, is known throughout the world, although pure Rock Pigeons are increasingly rare, having been displaced by the domesticated version. Some pigeon breeds such as homing pigeons have been extremely useful to humans.
• 
  Female mallard and ducklings at Burnaby Lake Regional Park
• 
  Red-whiskered bulbul
• 
  House Sparrow

  Photo: Fir0002

  The House Sparrow (Passer domesticus, male shown here) is the most widely distributed wild bird. It originated in the Middle East and has spread throughout much of the world, mostly due to deliberate introductions but also through natural dispersal and shipborne travel. It is quite successful, due to its adaptability and ability to easily co-exist with humans.
• 
  Greater Yellowlegs

  Photo credit: Alan Wilson

  The Greater Yellowlegs (Tringa melanoleuca, juvenile shown here) is a mid-sized shorebird similar in appearance to the smaller Lesser Yellowlegs. The Greater Yellowlegs can be distinguished from the Lesser Yellowlegs by its larger size and relatively longer bill. The bill of the Greater Yellowlegs is longer than the head, while the bill of the Lesser is about the same length.
• 
  Female mallard in mid-flight at Flying and gliding animals
• 
  Himalayan Bluetail

  Photograph: JJ Harrison

  The Himalayan Bluetail (Tarsiger rufilatus) is a small passerine bird. Males are of a more vibrant colour than females. This specimen was photographed at the summit of Doi Inthanon in Thailand.
• 
  Greylag goose
• 
  Crested Pigeon

  Photo: Benjamint444

  The Crested Pigeon (Ocyphaps lophotes) is found widely throughout mainland Australia except for the tropical northern areas. It is larger than the Spinifex Pigeon, the other Australian pigeon with an erect crest. The Crested Pigeon grows 30–34 cm (12–13 in) long and is coloured grey with tinges of brown, with striped wings that are bronzed.
• 
  Red crossbill
• 
  Pied bush chat

  Photograph credit: Charles James Sharp

  The pied bush chat (Saxicola caprata) is a small passerine bird widely distributed in Asia. The males are black with white shoulder and vent patches, while the females are predominantly brownish. This species is insectivorous, and like other chats hunts from a prominent low perch. This female pied bush chat was photographed in Pench National Park, India.
• 
  Rainbow Lorikeet

  Photo: Benjamint444

  The Rainbow Lorikeet (Trichoglossus haematodus, nominate race T. h. haematodus shown) is a true parrot found throughout Australasia. It ranges from 25 to 30 cm (9.8 to 11.8 in) in size, and has a wingspan of about 17 cm (6.7 in). The plumage of all 12 subspecies is very bright, with the exact distribution of colours varying by subspecies.
• 
  White-breasted nuthatch
• 
  Buller's albatross

  Photograph: JJ Harrison

  A Buller's albatross (Thalassarche bulleri) in flight, with a short-tailed shearwater behind it, as photographed east of the Tasman Peninsula, Tasmania, Australia. This small mollymawk species, named for the ornithologist Walter Buller, breeds on islands around New Zealand. It is classified as near threatened, though the population is increasing.
• 
  Malurus cyaneus cyanochlamys, juvenile
• 
  Canada goose
• 
  Red-billed streamertail

  Photograph credit: Charles James Sharp

  The red-billed streamertail (Trochilus polytmus) is the most common hummingbird in Jamaica, where it is the national bird. The female, shown here in hovering flight, lacks the red bill and long tail streamers of the male. The species's diet consists of nectar and small insects caught on the wing.
• 
  Eurasian Coot

  Photo credit: Noodle snacks

  A Eurasian Coot (Fulica atra) foraging for food. This member of the rail and crake family Rallidae occurs and breeds in Europe, Asia, Australia and Africa, and has recently expanded its range into New Zealand.
• 
  Mangrove pitta

  Photograph credit: John Harrison

  The mangrove pitta (Pitta megarhyncha) is a species of passerine bird in the family Pittidae native to the eastern Indian subcontinent and the westernmost parts of Southeast Asia. In general, pittas are reclusive birds and difficult to observe, but this species is easier than most, calling from high in mangrove trees, and responding readily to recordings of its voice. This mangrove pitta was photographed at Pulau Ubin in Singapore.
• 
  Bald eagle at Bird of prey
• 
  Scarlet Robin

  Photo credit: Fir0002

  The Scarlet Robin (Petroica boodang, female shown here) is a common red-breasted Australasian robin. It is endemic to Australia, where it is found near the coast from southern Queensland to central South Australia, Tasmania and south west Western Australia. It is a stocky passerine bird with a large head. It ranges in size from 12 to 13.5 cm (4.7 to 5.3 in) in length and weighs between 12 and 14 g (0.4 and 0.5 oz).
• 
  Black-necked stilt

  Photograph credit: Frank Schulenburg

  The black-necked stilt (Himantopus mexicanus) is a species of shorebird in the family Recurvirostridae, inhabiting wetlands and coastlines in North, Central and South America. Adults average about 36 cm (14 in) in length, with black-and-white plumage and a thin, straight, black bill. The legs are long and pink, and there is a white spot above the eye that distinguishes the species from the white-backed stilt.
  
  Seen here near Corte Madera, California, the black-necked stilt forages by probing and gleaning on mudflats, grassy marshes and lakesides, as well as in shallow waters near the shore; the diet consists mainly of insects and their larvae, crustaceans, other arthropods, mollusks, tadpoles and small fish. The species nests in colonies that may have several dozen pairs spread out loosely, with the birds defending an extensive perimeter around groups of nests, patrolling in cooperation with their neighbors.
• 
  Double-crested cormorant
• 
  Northern gannets
• 
  Feather

  Feathers are one of the epidermal growths that form the distinctive outer covering, or plumage, of birds. They are the outstanding characteristic that distinguishes the class Aves from all other living groups.
• 
  Eastern rosella

  Photograph: JJ Harrison

  A male (top) and female eastern rosella (Platycercus eximius). These rosellas, which average 30 cm (12 in) in length, are native to southeastern Australia and Tasmania. The species, first described by George Shaw in 1792, is sometimes considered a subspecies of the pale-headed rosella; the two hybridize where their ranges meet.
• 
  Chinese goose head at List of goose breeds
• 
  Willet

  Photo credit: Mdf

  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.
• 
  Protonotaria citrea

  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.
• 
  Long-billed curlew

Selected bird anatomy topic

Secarecytosis is a process involved in the development of a bird's lung cells, before the bird hatches from its egg. It is the processes of cell cutting during attenuation of the tubular epithelium of the developing avian lung. The word secarecytosis is derived from the Latin word secare which means "to cut".

Secarecytosis differs from holocrine and apocrine secretory mechanisms in that it occurs only during development and that portions of cells, complete with their organelles, are lost. It has three documented phenotypes. These are:

• formation of a double cell membrane and separation between the two membranes;
• formation of large vacuoles in the supranuclear cytoplasm, their subsequent fusion with each other and with the lateral cell membranes thus separating the apical portion;
• formation of many tiny vesicles that fuse with each other and the cell membrane thus severing portions of the cell. (Full article...)

Selected species

The mourning dove (Zenaida macroura) is a member of the dove family Columbidae. The bird is also called the American mourning dove, and formerly was known as the Carolina pigeon or Carolina turtledove. It ranges from Central America to southern Canada, including offshore islands. Many individuals in northern areas migrate south to spend winter within the breeding range where January temperatures are above −12° Celsius (10°F). Habitats include various open and semi-open environments, including agricultural and urban areas. The species has adapted well to areas altered by humans. The bird is abundant, with an estimated population of 130 million birds. In many areas, the mourning dove is hunted as a game bird for both sport and its meat. Its plaintive woo-oo-oo-oo call is common throughout its range, as is the whistling of its wings as it takes flight. The species is a strong flier, capable of speeds up to 88 km/h (55 mph).

Mourning doves are light grey and brown and generally muted in color. Males and females are similar in appearance. The species is generally monogamous, with two squabs (young) per brood. Both parents care for the young for a time. The species is a prolific breeder, and pairs will often have several broods per year. In warm areas, a pair may have up to six broods a year. Mourning doves eat mainly seeds, including those of both native and introduced plants.

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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Here are some tasks awaiting attention: Article requests : Endemic birds of Papua New Guinea (more) Cleanup : Bullfinch • Vesper sparrow • Bird flight • Bird bath (more) Copyedit : Plushcap • Magpie duck • Saker falcon (more) Expand : Phalarope • Nidicolous • Gouldian finch • Cathartes • Cnemophilidae • Avian malaria (more) NPOV : Debeaking • Driven grouse shooting • Abu Dhabi Falcon Hospital (more) Stubs : Cathartiformes • Semiplumbeous hawk • Rainbow-bearded Thornbill • Sunda scops owl (more) Update : Coal tit • Scottish crossbill • New Caledonian lorikeet • Operation Migration (more) Verify : Argus (bird) • Blyth's frogmouth • Nik Borrow • Pytilia • Fregata • Chestnut-headed tesia • Darter • Pallid scops owl • Starling (more) Wikify : Ninox boobook ocellata • The Institute for Bird Populations (more) Other : Add photos to bird articles needing photos (search Flickr for free images). Add taxonomic authorities to genus articles.

More outstanding tasks at the project's cleanup listing, Category:Birds articles needing attention, and Wikipedia:WikiProject Birds/Todo.

Taxonomy of Aves

Class Aves, divided into superorders, orders, suborders (where indicated), and families.

Paleognathae Struthioniformes: mainly southern hemisphere; 12 species, 2 extinct Struthionidae: ostrich Casuariidae: emus and cassowaries Apterygidae: kiwis Rheidae: rheas Tinamiformes: South America; 45 species Tinamidae: tinamous Neognathae Anseriformes: worldwide; ~150 species Anhimidae: screamers Anseranatidae: magpie-goose Anatidae: swans, geese and ducks Galliformes: worldwide except northern Eurasia; ~250 species. Megapodidae: mound-builders Cracidae: chachalacas, guans and curassows Tetraonidae: grouse Phasianidae: partridges, pheasants, quail and allies Odontophoridae: New World quails Numididae: guineafowl Meleagrididae: turkeys Mesitornithidae: mesites Sphenisciformes: Antarctic and southern waters; 16 species Spheniscidae: penguins Gaviiformes: North America, Eurasia; 5 species Gaviidae loons or divers Podicipediformes: worldwide; 20 species Podicipedidae: grebes Procellariiformes: pan-oceanic; ~100 species Diomedeidae: albatrosses Procellariidae: fulmars, prions, shearwaters, gadfly and other petrels Pelecanoididae: diving petrels Hydrobatidae: storm petrels Pelecaniformes: worldwide; ~50 species Pelecanidae: pelicans Sulidae: gannets and boobies Phalacrocoracidae: cormorants Fregatidae: frigatebirds Anhingidae: anhinga and darters Phaethontidae: tropicbirds Ciconiiformes: all continents; >100 species. Ardeidae: herons and bitterns Balaenicipitidae: shoebill Scopidae: hammerkop Ciconiidae: storks Threskiornithidae: ibises and spoonbills Phoenicopteridae flamingos Cathartidae: New World vultures and condors - sometimes placed in Falconiformes/Accipitriformes. Falconiformes worldwide; ~260 species. Sometimes all except the falcons are separated as Accipitriformes. Pandionidae: osprey Accipitridae: hawks, eagles, buzzards and Old World vultures, harriers, kites, and allies Sagittaridae: secretarybird Falconidae: falcons Gruiformes: worldwide; ~200 species Gruidae: cranes Aramidae: limpkin Psophiidae: trumpeters Rallidae: rails, crakes, coots and allies Heliornithidae: finfoots and sungrebe Rhynochetidae: kagu Eurypygidae: sunbittern Cariamidae: seriemas Otididae: bustards Charadriiformes: worldwide; >300 species Scolopacidae: typical waders or shorebirds Rostratulidae: painted snipe Jacanidae: jacanas Thinocoridae: seedsnipe Pedionomidae: plains wanderer Laridae: gulls Rhynchopidae: skimmers Sternidae: terns Alcidae: auks Stercorariidae: skuas Glareolidae: coursers and pratincoles Dromadidae: crab plover Turnicidae: buttonquails Burhinidae: thick-knees Chionididae: sheathbills Pluvianellidae: Magellanic plover Ibidorhynchidae: ibisbill Recurvirostridae: avocets and stilts Haematopodidae: oystercatchers Charadriidae: plovers and lapwings Pterocliformes: Africa, Europe, Asia; 16 species Pteroclidae: sandgrouse Columbiformes: worldwide; ~300 species Raphidae: dodo and Rodriguez solitaire Columbidae: pigeons and doves Psittaciformes: pan-tropical, southern temperate zones; ~330 species Cacatuidae: cockatoos Psittacidae: parrots Cuculiformes: worldwide; ~150 species Musophagidae: turacos and allies Cuculidae: cuckoos Opisthocomidae: hoatzin Strigiformes: worldwide; >130 species Tytonidae: barn owls Strigidae: typical owls Caprimulgiformes: worldwide; ~100 species Steatornithidae: oilbird Podargidae: frogmouths Nyctibiidae: potoos Aegothelidae: owlet-nightjars Caprimulgidae: nightjars Apodiformes: worldwide; >400 species Apodidae: swifts Hemiprocnidae: tree swifts Trochilidae: hummingbirds - sometimes separated as Trochiliformes Coliiformes: Sub-Saharan Africa; 6 species Coliidae: mousebirds Trogonidae: trogons and quetzals Coraciiformes: worldwide; ~200 species Alcedinidae: river kingfishers Halcyonidae: tree kingfishers Cerylidae: water or belted kingfishers Todidae: todies Momotidae: motmots Meropidae: bee-eaters Leptosomidae: cuckoo roller Brachypteraciidae: ground rollers Coraciidae: rollers Upupidae: hoopoe Phoeniculidae: woodhoopoes Bucerotidae: hornbills Piciformes: worldwide except Australasia; ~400 species Galbulidae: jacamars Bucconidae: puffbirds Capitonidae: barbets Indicatoridae: honeyguides Ramphastidae: toucans Picidae: woodpeckers Passeriformes: worldwide; >5000 species Suborder Tyranni ("suboscines") Tyrannidae: tyrant flycatchers Acanthisittidae: New Zealand wrens Pittidae: pittas Furnariidae: ovenbirds Thamnophilidae: antbirds Formicariidae: antpittas and antthrushes Conopophagidae: gnateaters Rhinocryptidae: tapaculos Cotingidae: cotingas Pipridae: manakins Philepittidae: asities Suborder Passeri ("oscines") Atrichornithidae: scrub-birds Menuridae: lyrebirds Turnagridae: piopio Alaudidae: larks Hirundinidae: swallows Motacillidae: wagtails and pipits Campephagidae: cuckoo-shrikes Eupetidae: rail-babbler Pycnonotidae: bulbuls Regulidae: kinglets Chloropseidae: leafbirds Aegithinidae: ioras Ptilogonatidae: silky-flycatchers Bombycillidae: waxwings Hypocoliidae: hypocolius Dulidae: palmchat Cinclidae: dippers Troglodytidae: wrens Mimidae: mockingbirds, thrashers and gray catbird Prunellidae: accentors Turdidae: thrushes and allies Cisticolidae: cisticolas and allies Sylviidae: Old World warblers Polioptilidae: gnatcatchers Muscicapidae: Old World flycatchers Platysteiridae: wattle-eyes Petroicidae: Australasian robins Pachycephalidae: whistlers and allies Picathartidae: rockfowl Timaliidae: babblers Pomatostomidae: pseudo-babblers Paradoxornithidae: parrotbills Orthonychidae: logrunner and chowchilla Cinclosomatidae: whipbirds and quail-thrushes Aegithalidae: long-tailed tits Maluridae: fairy-wrens, emu-wrens and grasswrens Neosittidae: sitellas Climacteridae: Australasian treecreepers Paridae: chickadees and tits Sittidae: nuthatches Tichodromidae: wallcreeper Certhiidae: treecreepers Rhabdornithidae: Philippine creepers Remizidae: penduline tits Nectariniidae: sunbirds and spiderhunters Melanocharitidae: berrypeckers and longbills Paramythiidae: tit berrypecker and crested berrypeckers Dicaeidae: flowerpeckers Pardalotidae: pardalotes, thornbills and alies Zosteropidae: white-eyes Promeropidae: sugarbirds Meliphagidae: honeyeaters and chats Oriolidae: Old World orioles Irenidae: fairy-bluebirds Laniidae: shrikes Malaconotidae: bushshrikes and allies Prionopidae: helmetshrikes Vangidae: vangas Dicruridae: drongos Callaeidae: wattlebirds Corcoracidae: white-winged chough and Apostlebird Artamidae: currawongs, woodswallows, butcherbirds & allies Pityriaseidae: bristlehead Paradisaeidae: birds-of-paradise Ptilonorhynchidae: bowerbirds Corvidae: crows, jays and magpies Sturnidae: starlings Passeridae: Old World sparrows Ploceidae: weavers and allies Estrildidae: waxbills and allies Viduidae: indigobirds Vireonidae: vireos and allies Fringillidae: finches, crossbills and allies Drepanididae: Hawaiian honeycreepers Peucedramidae: olive warbler Parulidae: New World warblers Coerebidae: bananaquit Thraupidae: tanagers and allies Emberizidae: buntings, seedeaters and allies Cardinalidae: saltators, cardinals and allies Icteridae: troupials and allies

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