Black Drongo
The black drongo (Dicrurus macrocercus) is a modest Asian passerine bird of the drongo family members Dicruridae. It is a popular resident breeder in a lot of tropical southern Asia from southwest Iran by way of India and Sri Lanka east to southern China and Indonesia. It is a wholly black chicken with a distinctive forked tail and measures 28 cm (11 in) in duration. It feeds on bugs, and is frequent in open up agricultural parts and light forest in the course of its vary, perching conspicuously on a bare perch or together energy or telephone lines. The species is recognised for its intense conduct to a lot greater birds, these types of as crows, in no way hesitating to dive-bomb any bird of prey that invades its territory. This behaviour earns it the casual title of king crow. Lesser birds typically nest in the very well-guarded vicinity of a nesting black drongo. Beforehand grouped together with the African fork-tailed drongo (Dicrurus adsimilis), the Asian sorts are now taken care of as a separate species with several distinctive populations.
The black drongo has been released to some Pacific islands, where it has thrived and come to be ample to the issue of threatening and triggering the extinction of indigenous and endemic fowl species there.
The black drongo was as soon as considered a subspecies of the fork-tailed drongo (Dicrurus adsimilis), a shut relative that diverged reasonably a short while ago. The two are now considered unique species, with the fork-tailed drongo limited to Africa and divided from the Asian vary of the black drongo.
7 subspecies have been named but the mainly contiguous populations show clinal variation and intergrade with each other. Individuals from northern India (ssp. albirictus) are more substantial than those from the Sri Lankan populace minimal though those people from the peninsular India (nominate subspecies) are intermediate in sizing. Race cathoecus is observed in Thailand, Hong Kong and China. This race has a substantially smaller sized rictal location and the wings are darkish with a greenish gloss. In southern Siam a race thai is resident, but overlaps with wintering cathoecus. Race javanus is found on the islands of Java and Bali. Race harterti identified in Formosa has the tail size a lot less than the wing.
This chicken is glossy black with a vast fork to the tail. Adults commonly have a little white location at the foundation of the gape. The iris is dim brown (not crimson as in the identical ashy drongo). The sexes are unable to be advised aside in the area. Juveniles are brownish and could have some white barring or speckling to the stomach and vent, and can be mistaken for the white-bellied drongo. To start with-yr birds have white suggestions to the feathers of the stomach, though second-years have these white-tipped feathers limited to the vent.
They are aggressive and fearless birds, and whilst only 28 cm (11 in) in duration, they will assault much bigger species that enter their nesting territory, which include crows and birds of prey. This conduct led to their former title of king crow. They fly with strong flaps of the wing and are capable of fast manoeuvres that help them to seize traveling insects. With small legs, they sit upright on thorny bushes, bare perches or electric power wires. They may also perch on grazing animals.
They are capable of making a vast range of calls but a typical connect with is a two be aware tee-hee phone resembling that of the Shikra (Accipiter badius).
The black drongo is observed predominantly in open up country and ordinarily perches and hunts close to the floor. They are largely aerial predators of insects but also glean from the floor or off vegetation. They are found as summer months site visitors to northeastern Afghanistan and northern Pakistan but are citizens from the Indus Valley until finally Bangladesh and into India and Sri Lanka. Some populations clearly show seasonal movements that are badly recognized. The black drongo can be located in savannas, fields, and urban habitats.
Black drongos were introduced just before the Second Globe War from Taiwan to the island of Rota to enable in the command of bugs. It is believed that they dispersed in excess of the sea to the island of Guam in the 1950s. By 1967, they were the fourth most generally viewed birds in roadside counts on Guam and are these days the most plentiful bird there. Predation by and competition from black drongos have been prompt as elements in the drop of endemic chook species this kind of as the Rota bridled white-eye and the Guam flycatcher.
Currently being popular, they have a extensive selection of nearby names. The more mature genus name of Buchanga was derived from the Hindi title of Bhujanga. Other neighborhood names include things like Thampal in Pakistan, Gohalo/Kolaho in Baluchistan, Kalkalachi in Sindhi, Kotwal (=policeman) in Hindi Finga in Bengali Phenshu in Assamese Cheiroi in Manipuri Kosita/ Kalo koshi in Gujarati Ghosia in Marathi Kajalapati in Oriya Kari kuruvi (=charcoal bird), Erettai valan (=two tail) in Tamil Passala poli gadu in Telugu Kaaka tampuratti (=queen of crows) in Malayalam Kari bhujanga in Kannada and Kalu Kawuda in Sinhalese.[70] A superstition in central India is that cattle would drop their horn if a newly fledged fowl alighted on it. It is held in reverence in areas of Punjab in the belief that it brought h2o to Husayn ibn Ali, revered by Shī‘a Muslims.
Posted by siddharthx on 2018-02-10 11:17:18
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