Wood duck Temporal range: | |
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Male (above) and female wood ducks, both at the Wissahickon Creek, Philadelphia. | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Aves |
Order: | Anseriformes |
Family: | Anatidae |
Genus: | Aix |
Species: | A. sponsa |
Binomial name | |
Aix sponsa | |
Range of A. sponsa Breeding range Year-round range Wintering range | |
Synonyms | |
Anas sponsa (Linnaeus, 1758)Lampronessa sponsa |
The wood duck or Carolina duck (Aix sponsa) is a partially migratory species of perching duck found in North America. The male is one of the most colorful North American waterfowls. [2] [3]
The wood duck was formally described in 1758 by the Swedish naturalist Carl Linnaeus in the tenth edition of his Systema Naturae under the binomial name Anas sponsa. [4] Linnaeus based his account on the "summer duck" from Carolina that had been described and illustrated by the English naturalist Mark Catesby in the first volume of his The Natural History of Carolina, Florida and the Bahama Islands that was published between 1729 and 1731. [5] Linnaeus specified the type locality as North America but this has been restricted to Carolina following Catesby. [6] The wood duck is now placed together with the mandarin duck in the genus Aix that was introduced in 1828 by the German naturalist Friedrich Boie. The species is monotypic: no subspecies are recognised. [7] The genus name is an Ancient Greek word for an unidentified diving bird mentioned by Aristotle. The specific epithet sponsa is Latin meaning "bride" (from spodere meaning "pledge"). [8]
The wood duck is a medium-sized perching duck. A typical adult is from 47 to 54 cm (19 to 21 in) in length with a wingspan of between 66 and 73 cm (26 and 29 in). The wood duck's weight ranges from 454–862 grams (16.0–30.4 oz). [9] This is about three-quarters the length of an adult mallard. It shares its genus with the Asian mandarin duck (Aix galericulata). [2]
The adult male has stunning multicolored iridescent plumage and red eyes, with a distinctive white flare down the neck. The female, less colorful, has a white eye-ring and a whitish throat. Both adults have crested heads. The speculum is iridescent blue-green with a white border on the trailing edge. [10]
The male's call is a rising whistle, jeeeeee; the females utter a drawn-out, rising squeal, do weep do weep, when flushed, and a sharp cr-r-ek, cr-e-ek for an alarm call. [11]
The birds are year-round residents in parts of its southern range, but the northern populations migrate south for the winter. [12] [13] They overwinter in the southern United States near the Atlantic Coast. 75% of the wood ducks in the Pacific Flyway are non-migratory. [13] Due to their attractive plumage, they are also popular in waterfowl collections and as such are frequently recorded in Great Britain as escapees—populations have become temporarily established in Surrey in the past, but are not considered to be self-sustaining in the fashion of the closely related mandarin duck.[ citation needed ] Along with the mandarin duck, the wood duck is considered an invasive species in England and Wales, and it is illegal to release them into the wild. [14] Given its native distribution, the species is also a potential natural vagrant to Western Europe and there have been records in areas such as Cornwall, Scotland and the Isles of Scilly, which some observers consider may relate to wild birds; however, given the wood duck's popularity in captivity, it would be extremely difficult to prove their provenance.[ citation needed ] There is a small feral population in Dublin.[ citation needed ]
Their breeding habitat is wooded swamps, shallow lakes, marshes, ponds and creeks in the eastern United States, the west coast of the United States, some adjacent parts of southern Canada, and the west coast of Mexico. They get their name from being one of the only species of ducks who perch and nest in trees. In recent decades, the breeding range has expanded towards the Great Plains. Currently most breeding occurs in the Mississippi alluvial valley. [15] They usually nest in cavities in trees close to water, although they will take advantage of nesting boxes in wetland locations. Other species may compete with them for nesting cavities, such as birds of prey, as well as mammals such as grey squirrels, and these animals may also occupy nest boxes meant for wood ducks. Wood ducks may end up nesting up to a mile away from their water source as a result. [16] Females line their nests with feathers and other soft materials, and the elevation provides some protection from predators such as raccoons, owls, and hawks. [17] Unlike most other ducks, the wood duck has sharp claws for perching in trees and can, in southern regions, produce two broods in a single season—the only North American duck that can do so. [11]
Wood ducks typically lay their first eggs from February to April. [18] Females typically lay seven to fifteen eggs which are incubated for an average of thirty days. [11] However, if nesting boxes are placed too close together, females may lay eggs in the nests of their neighbours, which may lead to nests with thirty eggs or more and unsuccessful incubation—a behaviour known as "nest dumping". [19] [20] : 7
The day after they hatch, the precocial ducklings climb to the opening of the nest cavity and jump down from the nest tree to the ground. The morning after hatching the hen will leave the nest to feed and also make sure it is safe for her chicks. When she decides its safe she uses a maternal call to call the chicks out. Wood duck nests are over water to brace the fall when the chicks jump they can jump from as high as 50 feet. [18] The mother calls them to her and guides them to water. [17] The ducklings can swim and find their own food by this time. Wood ducks prefer nesting over water so the young have a soft landing.
Wood ducks feed by dabbling (feeding from the surface rather than diving underwater) or grazing on land. They mainly eat berries, acorns, and seeds, but also insects, making them omnivores. [17] They are able to crush acorns after swallowing them within their gizzard. [21] [22]
The population of the wood duck was in serious decline in the late 19th century as a result of severe habitat loss and market hunting for both meat and plumage for the ladies' hat market in Europe. By the beginning of the 20th century, wood ducks had become rare, almost disappearing in many areas. In response to the Migratory Bird Treaty, established in 1916, and enactment of the U.S. Migratory Bird Treaty Act of 1918, wood ducks finally began to repopulate. By enforcing existing hunting regulations and protecting woodland and marsh habitat, wood duck populations began to rebound starting in the 1920s. The erection of nesting boxes starting in the 1930s further assisted wood duck conservation. [20] A synopsis of evidence from multiple studies performed by Williams et al. (2020) concluded that providing artificial nesting sites for wildfowl, including wood ducks, is beneficial. [23] Wood duck boxes have been found to be less effective than natural, hollow, dead trees but remain overall beneficial for the population. [24]
Landowners as well as park and refuge managers can encourage wood ducks by building wood duck nest boxes near lakes, ponds, and streams. Fulda, Minnesota, has adopted the wood duck as an unofficial mascot, and a large number of nest boxes can be found in the area.[ citation needed ]
Expanding North American beaver (Castor canadensis) populations throughout the wood duck's range have also helped the population rebound as beavers create an ideal forested wetland habitat for wood ducks. [13]
The population of the wood duck has increased a great deal in the last several years. The increase has been due to the work of many people constructing wood duck boxes and conserving vital habitat for the wood ducks to breed. During the open waterfowl season, U.S. hunters have been allowed to take only two wood ducks per day in the Atlantic and Mississippi Flyways. However, for the 2008–2009 season, the limit was raised to three. The wood duck limit remains at two in the Central Flyway and at seven in the Pacific Flyway. It is the second most commonly hunted duck in North America, after the mallard.[ citation needed ]
In 2013, the Royal Canadian Mint created two coins to commemorate the wood duck. The two coins are each part of a three coin set to help promote Ducks Unlimited Canada as well as celebrate its 75th anniversary. [25]
The pintail or northern pintail is a duck species with wide geographic distribution that breeds in the northern areas of Europe and across the Palearctic and North America. It is migratory and winters south of its breeding range to the equator. Unusually for a bird with such a large range, it has no geographical subspecies if the possibly conspecific duck Eaton's pintail is considered to be a separate species.
The gadwall is a common and widespread dabbling duck in the family Anatidae.
The American wigeon, also known as the baldpate, is a species of dabbling duck found in North America. Formerly assigned to Anas, this species is classified with the other wigeons in the dabbling duck genus Mareca. It is the New World counterpart of the Eurasian wigeon.
The mallard or wild duck is a dabbling duck that breeds throughout the temperate and subtropical Americas, Eurasia, and North Africa. It has been introduced to New Zealand, Australia, Peru, Brazil, Uruguay, Argentina, Chile, Colombia, the Falkland Islands, and South Africa. Belonging to the subfamily Anatinae of the waterfowl family Anatidae, mallards live in wetlands, eat water plants and small animals, and are social animals preferring to congregate in groups or flocks of varying sizes.
The Eurasian teal, common teal, or Eurasian green-winged teal is a common and widespread duck that breeds in temperate Eurosiberia and migrates south in winter. The Eurasian teal is often called simply the teal due to being the only one of these small dabbling ducks in much of its range. The bird gives its name to the blue-green colour teal.
The green-winged teal or American teal is a common and widespread duck that breeds in the northern areas of North America except on the Aleutian Islands. It was considered conspecific with the Eurasian teal for some time, but the two have since been split into separate species. The American Ornithological Society continues to debate this determination; however, nearly all other authorities consider it distinct based on behavioral, morphological, and molecular evidence. The scientific name is from Latin Anas, "duck" and carolinensis, "of Carolina".
The mandarin duck is a perching duck species native to the East Palearctic. It is sexually dimorphic, with males showing a dramatic difference from the females. It is medium-sized, at 41–49 cm (16–19 in) long with a 65–75 cm (26–30 in) wingspan. It is closely related to the North American wood duck, the only other member of the genus Aix. 'Aix' is an Ancient Greek word which was used by Aristotle to refer to an unknown diving bird, and 'galericulata' is the Latin for a wig, derived from galerum, a cap or bonnet. Outside of its native range, the mandarin duck has a large introduced population in the British Isles and Western Europe, with additional smaller introductions in North America.
The hooded merganser is a species of fish-eating duck in the subfamily Anatinae. It is the only extant species in the genus Lophodytes. The genus name derives from the Greek language: lophos meaning 'crest', and dutes meaning 'diver'. The bird is striking in appearance; both sexes have crests that they can raise or lower, and the breeding plumage of the male is handsomely patterned and coloured. The hooded merganser has a sawbill but is not classified as a typical merganser.
The common merganser or goosander (Eurasian) is a large sea duck of rivers and lakes in forested areas of Europe, Asia, and North America. The common merganser eats mainly fish. It nests in holes in trees.
The common eider, also called St. Cuthbert's duck or Cuddy's duck, is a large sea-duck that is distributed over the northern coasts of Europe, North America and eastern Siberia. It breeds in Arctic and some northern temperate regions, but winters somewhat farther south in temperate zones, when it can form large flocks on coastal waters. It can fly at speeds up to 113 km/h (70 mph).
The common goldeneye or simply goldeneye is a medium-sized sea duck of the genus Bucephala, the goldeneyes. Its closest relative is the similar Barrow's goldeneye. The genus name is derived from the Ancient Greek boukephalos, a reference to the bulbous head shape of the bufflehead. The species name is derived from the Latin clangere.
The bufflehead is a small sea duck of the genus Bucephala, the goldeneyes. It breeds in Alaska and Canada and migrates in winter to southern North America. This species was first described by Carl Linnaeus in his landmark 1758 10th edition of Systema Naturae as Anas albeola.
The mountain bluebird is a migratory small thrush that is found in mountainous districts of western North America. It has a light underbelly and black eyes. Adult males have thin bills and are bright turquoise-blue and somewhat lighter underneath. Adult females have duller blue wings and tail, grey breast, grey crown, throat and back. In fresh fall plumage, the female's throat and breast are tinged with red-orange which is brownish near the flank, contrasting with white tail underparts. Their call is a thin 'few' while their song is a warbled high 'chur chur'. The mountain bluebird is the state bird of Idaho and Nevada. This bird is an omnivore and it can live 6 to 10 years in the wild. It eats spiders, grasshoppers, flies and other insects, and small fruits. The mountain bluebird is a relative of the eastern and western bluebirds.
The pileated woodpecker is a large, mostly black woodpecker native to North America. An insectivore, it inhabits deciduous forests in eastern North America, the Great Lakes, the boreal forests of Canada, and parts of the Pacific Coast. It is the largest confirmed extant woodpecker species in North America, with the possible exception of the ivory-billed woodpecker, which the U.S. Fish and Wildlife Service has proposed be reclassified as extinct. It is also the third largest extant species of woodpecker in the world, after the great slaty woodpecker and the black woodpecker. "Pileated" refers to the bird's prominent red crest, from the Latin pileatus meaning "capped".
The northern flicker or common flicker is a medium-sized bird of the woodpecker family. It is native to most of North America, parts of Central America, Cuba, and the Cayman Islands, and is one of the few woodpecker species that migrate. Over 100 common names for the northern flicker are known, including yellowhammer, clape, gaffer woodpecker, harry-wicket, heigh-ho, wake-up, walk-up, wick-up, yarrup, and gawker bird. Many of these names derive from attempts to imitate some of its calls. It is the state bird of Alabama.
The red-headed woodpecker is a mid-sized woodpecker found in temperate North America. Its breeding habitat is open country across southern Canada and the east-central United States. It is rated as least concern on the International Union for Conservation of Nature (IUCN)'s Red List of Endangered species, having been down-listed from near threatened in 2018.
The Muscovy duck is a duck native to the Americas, from the Rio Grande Valley of Texas and Mexico south to Argentina and Uruguay. Feral Muscovy ducks are found in New Zealand, Australia, and in Central and Eastern Europe. Small wild and feral breeding populations have also established themselves in the United States, particularly in Florida, Louisiana, Massachusetts, the Big Island of Hawaii, as well as in many other parts of North America, including southern Canada.
Aix is a bird genus that contains two species of ducks: the wood duck, and the mandarin duck. Aix is an Ancient Greek word used by Aristotle to refer to an unknown diving bird.
The black-bellied whistling duck, formerly called the black-bellied tree duck, is a whistling duck that before 2000 bred mainly in the southernmost United States, Mexico, and tropical Central to south-central South America. It can be found year-round in much of the United States. It has been recorded in every eastern state and adjacent Canadian province. Since it is one of only two whistling duck species native to North America, it is occasionally just known as the "whistling duck" or "Mexican squealer" in the southern USA.
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