Crested treeswift

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Species of bird

title: "Crested treeswift" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["hemiprocne", "birds-of-south-asia", "birds-of-indochina", "birds-described-in-1833"] description: "Species of bird" topic_path: "geography/china" source: "https://en.wikipedia.org/wiki/Crested_treeswift" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Species of bird ::

| image = Crested_treeswift_(Hemiprocne_coronata)_Male_Female_Photographs_by_Shantanu_Kuveskar.jpg | image_caption = The male (left) has chestnut ear coverts while the female (right) does not. | status = LC | status_system = IUCN3.1 | status_ref = | genus = Hemiprocne | species = coronata | authority = (Tickell, 1833) | synonyms = Dendrochelidon coronatus

Hirundo coronata Tickell, 1833

Hemiprocne longipennis dryas Ripley, 1950

H. l. coronata

The crested treeswift (Hemiprocne coronata) is a species of tree swift. It was for some time considered the same species as its eastern relative, the gray-rumped treeswift (Hemiprocne longipennis), but they do not interbreed where their ranges overlap. It is distinct in flight, with long, bowed wings and a deeply forked tail that usually appears narrow and pointed.

Description

The crested treeswift is a large slender bird at 23 cm length. This species is dove grey above and white below. The long swept-back wings are a darker grey above. This treeswift has a crest and a long, deeply forked tail. The adult male has orange cheeks and ear coverts with a narrow streak of white under the eye and a trace of a white supercilium. The female also has a thin white stripe below the eye running below the grey cheek and ear coverts. Young birds have a dark grey head and wings but the feathers are edged in white and the rest of the soft plumage is much streakier than that of the adults. They are found in small groups that fly in wide circles in open forest, occasionally perching atop a tall and leafless tree. When perched they appear to sit very upright.

The call of this species is a harsh kee-kyew or three note kip-kee-kep with emphasis on the middle note.

Taxonomy and systematics

The species was first given a binomial name with a description by Samuel Tickell in 1833. He collected specimens during his travels in the Borabhum and Dholbhum area while serving as a lieutenant in the 31st regiment of native infantry. He called it Hirundo coronatus and gave it the trivial name of Dhudka Swallow. He noted that it was not found throughout the year. The genus Hemiprocne was erected by Christian Ludwig Nitzsch in 1829 but the species has variously been incorrectly treated in the past in Dendrochelidon and Macropteryx. Jerdon, a quinarian, considered the species to be a link between the swifts and swallows on the basis of their silky plumage, uncharacteristic of the swifts. Dillon Ripley described a new subspecies dryas from a specimen obtained by Salim Ali from Rajpipla in southern Gujarat. He considered it to be paler grey on the upperparts than the known forms. This is however no longer considered a valid subspecies and represents variation within the widely distributed species.

The genus is the sole member of the tribe Hemiprocnini which is, based on one morphological cladistics, considered to be more derived than the Cypseloidini (while some others have suggested that Hemiprocne is basal) and basal to the Collocaliini and more derived tribes Chaeturini and Apodini. The posterior portion of the sternum has two openings or foramina and the fifth secondary is absent (also known as diastataxic, a character shared with Cypseloides) whereas other swifts have the fifth secondary (and are said to be eutaxic). Like all swifts this species uses saliva to build its nest but it does not have all the toes facing forward as in the Apodini.

Distribution and habitat

| align = left | image1 = Crested Treeswift Male in flight, Thattekad, Kerala, India.jpg | alt1 = | image2 =Crested Treeswift Female in flight, Thattekad, Kerala, India.jpg | alt2 = | footer_align = center | footer = In flight, the tail appears long and pointed and the deep fork may be visible only briefly The crested treeswift is a common resident breeder from the Indian subcontinent. It is found in India, Sri Lanka, Bhutan, Bangladesh, Nepal, Myanmar, Thailand, Vietnam, Cambodia, Laos and China. These are birds of open woodland and deciduous forests. They are also found in open areas near trees and in parks and gardens. Most birds live in the lowlands below 1000 m.

Behaviour

The crested treeswift builds a tiny and thin-walled and shallow nest made up of pieces of bark and feathers which is glued with saliva to the side of an exposed tree branch. It lays one blue-grey egg which is incubated by both sexes. The nest is so small that incubating birds may just appear as if just normally perched on a branch having a knot. Adults may also sit along the branch when incubating. Nearly half the egg is visible above the edge of the nest and is covered by the down feathers of their breast and belly when incubating.

The crested treeswift feeds in the air, capturing insects (including honey bees) on the wing with its bill. They are known to sometimes roost communally.

Status

The crested treeswift has a very large range, the population size seems stable and it is considered relatively common. For these reasons, the IUCN has listed it as being of "Least Concern".

References

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References

  1. BirdLife International. (2018). "''Hemiprocne coronata''".
  2. Blanford, W.T.. (1895). "The Fauna of British India, including Ceylon and Burma. Birds. Volume III". Taylor and Francis.
  3. (1983). "Handbook of the Birds of India and Pakistan, together with those of Bangladesh, Nepal, Bhutan and Sri Lanka. Volume 4. Frogmouths to Pittas.". Oxford University Press.
  4. Abdulali, Humayun. (1972). "A catalogue of the birds in the collection of the Bombay Natural History Society-12. Apodidae and Trogonidae". Journal of the Bombay Natural History Society.
  5. Tickell, S.R.. (1833). "List of birds, collected in the jungles of Borabhum and Dholbhum". Journal of the Asiatic Society of Bengal.
  6. Jerdon, T.C.. (1862). "The Birds of India. Volume I.". Military Orphan Press.
  7. Brooke, RK. (1969). "''Hemiprocne coronata'' is a good species". Bulletin of the British Ornithologists' Club.
  8. Ripley, S. Dillon. (1950). "New birds from Nepal and the Indian Region". Proceedings of the Biological Society of Washington.
  9. Lack, David. (1956). "A review of the genera and nesting habits of swifts". Auk.
  10. Baker, E.C. Stuart. (1927). "The Fauna of British India. Birds. Volume 4".
  11. Mayr, Gerald. (2010). "Phylogenetic relationships of the paraphyletic 'caprimulgiform' birds (nightjars and allies)". Journal of Zoological Systematics and Evolutionary Research.
  12. Holmgren, J.. (1998). "A parsimonious phylogenetic tree for the swifts, Apodi, compared with DNA-analysis phylogenies". Bulletin of the British Ornithologists' Club.
  13. Lucas, F.A.. (1895). "Deep flexor tendons of Macropteryx". Ibis.
  14. Lucas, Frederic A.. (1889). "The Main Divisions of the Swifts". The Auk.
  15. (1936). "The nesting of the Indian Crested Swift (''Hemiprocne coronata'') in Upper Burma". Journal of the Bombay Natural History Society.
  16. Lowther,E.H.N.. (1936). "Notes on some Indian birds. I. The Indian Crested Swift". Journal of the Bombay Natural History Society.
  17. Smythies, B.E.. (1953). "Crested Tree Swifts and wild bees". J. Bombay Nat. Hist. Soc..

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