Mandarin Duck, Aix galericulata, オシドリ

The Mandarin Duck (Aix galericulata) is a perching duck species native to East Asia. It is medium-sized, at 41–49 cm long with a 65–75 cm 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.

Distribution and habitat
The species was once widespread in East Asia, but large-scale exports and the destruction of its forest habitat have reduced populations in eastern Russia and in China to below 1,000 pairs in each country; Japan, however, is thought to still hold some 5,000 pairs. The Asian populations are migratory, overwintering in lowland eastern China and southern Japan.

Specimens frequently escape from collections, and in the 20th century, a large, feral population was established in Great Britain; more recently, small numbers have bred in Ireland, concentrated in the parks of Dublin. Now, about 7,000 are in Britain with other populations on the European continent, the largest of which is in the region of Berlin.

Isolated populations exist in the United States. The town of Black Mountain, North Carolina, has a limited population, and a free-flying feral population of several hundred mandarins exist in Sonoma County, California. This population is the result of several ducks escaping from captivity, then reproducing in the wild.

In 2018, a single bird was seen in New York City's Central Park.

The habitats it prefers in its breeding range are the dense, shrubby forested edges of rivers and lakes. It mostly occurs in low-lying areas, but it may breed in valleys at altitudes of up to 1,500 m . In winter, it additionally occurs in marshes, flooded fields, and open rivers.

While it prefers fresh water, it may also be seen wintering in coastal lagoons and estuaries. In its introduced European range, it lives in more open habitat than in its native range, around the edges lakes, water meadows, and cultivated areas with woods nearby.

Mandarin Duck, Aix galericulata, オシドリ

Range map
Range map from www.oiseaux.net - Ornithological Portal Oiseaux.net
www.oiseaux.net is one of those MUST visit pages if you're in to bird watching. You can find just about everything there


Mandarin Duck, Aix galericulata, オシドリ
Mandarin Duck, Aix galericulata, オシドリ
The native range of the mandarin duck, and parts of its introduced range where it is established breeding - Click HERE for bigger map
By User:Engineer111, expanded & updated User:MPF - Own work, CC BY-SA 3.0,
https://commons.wikimedia.org/w/index.php?curid=74672


Description
The adult male has a red bill, large white crescent above the eye and reddish face and "whiskers". The male's breast is purple with two vertical white bars, and the flanks ruddy, and he has two orange "sails" at the back (large feathers that stick up like boat sails).

The female is similar to the female wood duck, with a white eye-ring and stripe running back from the eye, but is paler below, has a small white flank stripe, and a pale tip to its bill.

Both the males and females have crests, but the purple crest is more pronounced on the male.

Like many other species of ducks, the male undergoes a moult after the mating season into eclipse plumage. When in eclipse plumage, the male looks similar to the female, but can be told apart by its bright yellow-orange or red beak, lack of any crest, and a less-pronounced eye-stripe.

Eclipse Plumage

Many ducks have bright, colourful plumage, exhibiting strong sexual dimorphism. However, they moult into a dull plumage after breeding in mid-summer. This drab, female-like appearance is called eclipse plumage. When they shed feathers to go into eclipse, the ducks become flightless for a short period of time.

Some duck species remain in eclipse for one to three months in the late summer and early fall, while others retain the cryptic plumage until the next spring when they undergo another moult to return to their breeding plumage.

Although mainly found in the Anatidae, a few other species, including related red junglefowl, most fairywrens and some sunbirds also have an eclipse plumage. In the superb and splendid fairywrens, very old males (over about four years) may moult from one nuptial plumage to another whereas in the red-backed and white-winged fairywrens, males do not acquire nuptial plumage until four years of age – well after they become sexually mature and indeed longer than the vast majority of individuals live.

In contrast to the ducks, males of hummingbirds and most lek-mating passerines – like the Guianan cock-of-the-rock or birds of paradise – retain their exuberant plumage and sexual dimorphism at all times, moulting as ordinary birds do once annually.



Mandarin ducklings are almost identical in appearance to wood ducklings, and very similar to mallard ducklings. The ducklings can be distinguished from mallard ducklings because the eye-stripe of mandarin ducklings (and wood ducklings) stops at the eye, while in mallard ducklings it reaches all the way to the bill.

Mutations
Various mutations of the mandarin duck are found in captivity. The most common is the white mandarin duck. Although the origin of this mutation is unknown, the constant pairing of related birds and selective breeding is presumed to have led to recessive gene combinations leading to genetic conditions including leucism.

Length:
51 cm
Wingspan:
68 - 74 cm
Weight:
428 - 693 g
Longevity:
-
Distinctive Feature
Similar Species


From opus at www.birdforum.net the forum for wild birds and birding.


Listen to the Mandarin Duck
Sound from www.xeno-canto.org

Remarks from the Recordist

Natural vocalization; various calls during display from some of a flock of 30 birds on a large, steep-sided reservoir in a forested valley.

Near the beginning of the cut there are a bunch of weird scraping sounds made by the birds, but I'm not sure if they are male or female noises.

Lots of quiet, wheezy and whistle calls throughout the cut, best near the end.




Behaviour
Breeding
In the wild, mandarin ducks breed in densely wooded areas near shallow lakes, marshes or ponds. They nest in cavities in trees close to water and during the spring, the females lay their eggs in the tree's cavity after mating.

Mandarin Duck, Aix galericulata, オシドリ
Egg, Museum Wiesbaden collection
By Klaus Rassinger und Gerhard Cammerer, Museum Wiesbaden - Own work, CC BY-SA 3.0,
https://commons.wikimedia.org/w/index.php?curid=35758598


A single clutch of nine to twelve eggs is laid in April or May. Although the male may defend the brooding female and his eggs during incubation, he himself does not incubate the eggs and leaves before they hatch. Shortly after the ducklings hatch, their mother flies to the ground and coaxes the ducklings to leap from the nest. After all of the ducklings are out of the tree, they will follow their mother to a nearby body of water.

Food and feeding
Mandarins feed by dabbling or walking on land. They mainly eat plants and seeds, especially beech mast. The species will also add snails, insects and small fish to its diet. The diet of mandarin ducks changes seasonally; in the fall and winter, they mostly eat acorns and grains.

In the spring, they mostly eat insects, snails, fish and aquatic plants. In the summer, they eat dew worms, small fish, frogs, mollusks, and small snakes. They feed mainly near dawn or dusk, perching in trees or on the ground during the day.

Threats
Predation of the mandarin duck varies between different parts of its range. Mink, raccoon dogs, otters, polecats, Eurasian eagle owls, and grass snakes are all predators of the mandarin duck. The greatest threat to the mandarin duck is habitat loss due to loggers.

Hunters are also a threat to the mandarin duck, because often they are unable to recognize the mandarin in flight and as a result, many are shot by accident. Mandarin ducks are not hunted for food, but are still poached because their extreme beauty is prized.

In culture


Chinese culture
The Chinese refer to Mandarin ducks as yuanyang (simplified Chinese: 鸳鸯; traditional Chinese: 鴛鴦; pinyin: yuānyāng), where yuan (鴛) and yang (鴦) respectively stand for male and female mandarin ducks. In traditional Chinese culture, mandarin ducks are believed to be lifelong couples, unlike other species of ducks. Hence they are regarded as a symbol of conjugal affection and fidelity, and are frequently featured in Chinese art.

A Chinese proverb for loving couples uses the mandarin duck as a metaphor: "Two mandarin ducks playing in water" (simplified Chinese: 鸳鸯戏水; traditional Chinese: 鴛鴦戲水; pinyin: yuānyāng xì shuǐ). A mandarin duck symbol is also used in Chinese weddings because in traditional Chinese lore, they symbolize wedded bliss and fidelity.

Because the male and female plumages of the mandarin duck are so unalike, yuan-yang is frequently used colloquially in Cantonese to mean an "odd couple" or "unlikely pair" – a mixture of two different types of same category. For example, the drink yuanyang and yuan-yang fried rice. Mandarin ducks featured on the flag of Weihaiwei during British rule.

Korean culture
For Koreans, mandarin ducks represent peace, fidelity, and plentiful offspring. Similar to the Chinese, they believe that these ducks mate for life. For these reasons, pairs of mandarin ducks called wedding ducks are often given as wedding gifts and play a significant role in Korean marriage.

Japanese culture
Similarly, in Japanese the ducks are called oshidori (おしどり/オシドリ/鴛鴦) and are used in the phrase oshidori fūfu (おしどり夫婦, "a couple of lovebirds/happily married couple").

Conservation status
Mandarin Duck, Aix galericulata, オシドリ
Vulnerable IUCN Red List of Threatened Species. IUCN. 2012: e.T22680107A40697187.
doi:10.2305/IUCN.UK.2012-1.RLTS.T22680107A40697187.en. Retrieved 8 August 2016.



From Wikipedia, the free encyclopedia
From Wikipedia, the free encyclopedia

www.birdforum.net


Sighted: (Date of first photo that I could use) 7 April 2019
Location: Tairoike Pond and Miyake Nature Center


Mandarin Duck, Aix galericulata, オシドリ
Mandarin Duck / オシドリ



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