Indian nightjar

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Indian nightjar
Common Indian Nightjar joby.JPG
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Caprimulgiformes
Family: Caprimulgidae
Genus: Caprimulgus
Species:
C. asiaticus
Binomial name
Caprimulgus asiaticus
Latham, 1790

The Indian nightjar (Caprimulgus asiaticus) is a small nightjar which is a resident breeder in open lands across South Asia and Southeast Asia. Like most nightjars it is crepuscular and is best detected from its characteristic calls at dawn and dusk that have been likened to a stone skipping on a frozen lake - a series of clicks that become shorter and more rapid. They are sometimes spotted on roads when their eyes gleam red in the spotlight of a vehicle. There is considerable plumage variation across its range and can be hard to differentiate from other nightjars in the region especially in the field.

Contents

Description

This nightjar is small and short-tailed with white corners to the tail, a golden nape and collar, dark cheeks and white patches on the sides of the throat. The crown is grey and the breast is finely barred in brown. The males have more white on the tail while the female is more heavily streaked on the crown. It is differentiated from Sykes's nightjar by the dark undertail and from Jerdon's nightjar by the shorter tail and white patches on the sides of the throat. [2]

The call is distinctive and has been likened to a stone skipped on a frozen lake (due to which it was also called the "ice-bird" in colonial India [3] [4] ) or a ping-pong ball bouncing rapidly and coming to rest. [2]

It flies after sundown with an easy, silent moth-like flight. During the day, Indian nightjar lies still on the ground, concealed by its plumage; it is then difficult to detect, blending in with the soil.

Taxonomy and systematics

The populations show clinal variation with paler plumage in the dry zone of northwestern India. The population of Sri Lanka is named eidos and is darker and greyer overall. In northwestern India, subspecies gurgaoni is very pale sandy buff with nominate populations of peninsular India showing considerable variation. [2]

Habitat and distribution

The species is found in open woodland, scrub, and cultivation. It usually sits on the ground or low trees and is not found on high perches.

The species is found from northwestern India and adjoining parts of Pakistan but not found in the arid desert region. It is found south of the Himalayas in the low elevations east to Bangladesh, Myanmar and Vietnam. It is also found in Sri Lanka.

No nest is made; the two beautifully marbled creamy pink eggs are placed upon the bare ground during February to September; the brooding bird, sitting closely, is well camouflaged. Eggs may be moved short distances. [5] The newly hatched chick is covered in down with brown above and light rufous below. The eye is open on hatching and the chick can sit upright and make a weak sound. [6]

Feeding

Nightjars are most active, and mostly feed, near dawn and dusk (crepuscular - active during the twilight). At dusk, they often fly around livestock to feed on insects swarming around the animals. At night, they like to take advantage of insects swarming around street lamps or other artificial light sources. They are keeping their bills wide open as they fly through clouds of small insects. Nightjars may also forage under the canopy by flying from favored perches catching insects at foliage heights of 5 – 15 feet (~1.5 – 5 m). Larger insects are usually taken back to their favored feeding perches. While holding the insects in their bills, nightjars keep the head upright, shake and swallow the prey whole, or they may break the insects apart before eating. Insects may also be taken from the ground or foliage. Juvenile nightjars typically sit on the ground before making short jumps or flights to capture insects. The bulk of their diet consists of flying / swarming insects, such as mosquitoes, flies, beetles, locusts, winged ants, moths and grasshoppers, as well as plant lice and crickets. To a lesser extent, they will also eat larvae, nymphs and eggs.

This common species frequently rests on roads during the night, sometimes capturing insects under street lights. [7] Their bright reflective eye-shine makes them easy to spot in the beams of vehicle headlights. They may however be stunned by bright lights and many are killed by vehicular traffic. [8]

Related Research Articles

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Sri Lanka frogmouth Species of bird

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Black eagle Species of bird

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Jerdons nightjar Species of bird

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Purple sunbird Species of bird

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Yellow-billed babbler Species of brown-grey bird from southern India and Sri Lanka

The yellow-billed babbler is a member of the family Leiothrichidae endemic to southern India and Sri Lanka. The yellow-billed babbler is a common resident breeding bird in Sri Lanka and southern India. Its habitat is scrub, cultivation and garden land. This species, like most babblers, is not migratory, and has short rounded wings and a weak flight and is usually seen calling and foraging in groups. It is often mistaken for the jungle babbler, whose range overlaps in parts of southern India, although it has a distinctive call and tends to be found in more vegetated habitats. Its name is also confused with Turdoides leucocephala, which is also known as white-headed babbler.

Indian robin Species of bird

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Oriental magpie-robin Species of bird

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<i>Caprimulgus</i> Genus of birds

Caprimulgus is a large and very widespread genus of nightjars, medium-sized nocturnal birds with long pointed wings, short legs and short bills. Caprimulgus is derived from the Latin capra, "nanny goat", and mulgere, "to milk", referring to an old myth that nightjars suck milk from goats. The common name "nightjar", first recorded in 1630, refers to the nocturnal habits of the bird, the second part of the name deriving from the distinctive churring song.

Yellow-rumped honeyguide Species of bird

The yellow-rumped honeyguide is a sparrow-sized bird in the honeyguide family that is found in Asia, mainly in montane forests along the Himalayas. They are very finch-like but the feet are strong and zygodactyl, with two toes facing forward and two backward. They perch on honeycombs and feed on wax. Males tend to be territorial and stay near honeycombs while females and juveniles forage widely. They are brood parasites, laying their eggs in the nests of tree-hole breeders, possibly barbets.

Ashy woodswallow Species of bird

The ashy woodswallow, sometimes also called the ashy swallow-shrike, is a woodswallow which is found in south Asia. Like other woodswallows, it has a short curved bill, a short square tail and long wings. It is usually seen perched in groups, high on powerlines, tall bare trees and most often in areas with a predominance of tall palm trees.

Common hawk-cuckoo Species of bird

The common hawk-cuckoo, popularly known as the brainfever bird, is a medium-sized cuckoo resident in the Indian subcontinent. It bears a close resemblance to the Shikra, even in its style of flying and landing on a perch. The resemblance to hawks gives this group the generic name of hawk-cuckoo and like many other cuckoos these are brood parasites, laying their eggs in nests of babblers. During their breeding season in summer males produce loud, repetitive three note calls that are well-rendered as brain-fever, the second note being longer and higher pitched. These notes rise to a crescendo before ending abruptly and repeat after a few minutes; the calling may go on through the day, well after dusk and before dawn.

Jungle nightjar Species of bird

The jungle nightjar is a species of nightjar found in the Indian Subcontinent. It is found mainly on the edge of forests where it is seen or heard at dusk. The taxonomy of this and related nightjars is complex and a range of treatments have been followed that cover this and several other nightjars in the Asian region. It was formerly called the grey nightjar or Indian jungle nightjar and sometimes included the East Asian grey nightjar as a subspecies.

Black baza Species of bird

The black baza is a small bird of prey found in the forests of Northeast India, the eastern Himalayas, China and Southeast Asia. Many populations are migratory, including those in the Indian region, which winter in the south of the Peninsula and Sri Lanka. Black bazas have short, stout legs and feet with strong talons, and a prominent crest. They are found in dense forest, often in small groups, and can often be found perched on bare branches of tall trees rising above the forest canopy.

Bank myna Species of bird

The bank myna is a myna found in the northern parts of South Asia. It is smaller but similar in colouration to the common myna, only differing in having brick-red naked skin behind the eyes instead of yellow. It is greyer on the underside and in this and in the presence of a slight tuft of feathers bears some resemblance to the jungle myna. They are found in flocks on the plains of northern and central India, often within towns and cities. Their range appears to be extending southwards into India. The name is derived from their habit of nesting almost exclusively in the earthen banks of rivers, where they excavate burrows and breed in large colonies.

References

  1. BirdLife International (2016). "Caprimulgus asiaticus". IUCN Red List of Threatened Species . 2016: e.T22689969A93253992. doi: 10.2305/IUCN.UK.2016-3.RLTS.T22689969A93253992.en . Retrieved 13 November 2021.
  2. 1 2 3 Rasmussen PC & JC Anderson (2005). Birds of South Asia. The Ripley Guide. Volume 2. Smithsonian Institution and Lynx Edicions. pp. 254–255.
  3. Jerdon, T.C. (1862). The Birds of India. Volume I. Calcutta. p.  197.
  4. Dewar, Douglas (1920). India Birds. Being a key to the common birds of the plains of India. London: John Lane The Bodley Head. p.  169.
  5. Barnes, Alice D (1937). "Breeding of the Little Indian Nightjar Caprimulgus asiaticus asiaticus in the Chingleput District". J. Bombay Nat. Hist. Soc. 39 (4): 865–867.
  6. Lamba, BS (1967). "Nestling of Common Indian Nightjar (Caprimulgus asiaticus Latham)". J. Bombay Nat. Hist. Soc. 64 (1): 110–111.
  7. Bharos,AMK (1992). "Feeding by Common Nightjar Caprimulgus asiaticus and Indian Roller Coracias benghalensis in the light of mercury vapour lamps". J. Bombay Nat. Hist. Soc. 89 (1): 124.
  8. Saxena, R. (1992). "Mortality rate in Common Indian Nightjar in road accidents". Newsletter for Birdwatchers . 32 (9–10): 17.