Hairy-crested antbird

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Hairy-crested antbird
Rhegmatorhina melanosticta -NBII Image Gallery-a00183.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Passeriformes
Family: Thamnophilidae
Genus: Rhegmatorhina
Species:
R. melanosticta
Binomial name
Rhegmatorhina melanosticta
Rhegmatorhina melanosticta map.svg

The hairy-crested antbird (Rhegmatorhina melanosticta) is a species of bird in subfamily Thamnophilinae of family Thamnophilidae, the "typical antbirds". It is found in Bolivia, Brazil, Colombia, Ecuador, and Peru. [2]

Contents

Taxonomy and systematics

The hairy-crested antbird was described by the English ornithologists Philip Sclater and Osbert Salvin in 1880 and given the binomial name Pithys melanosticta. [3] The present genus Rhegmatorhina was introduced by the American ornithologist Robert Ridgway in 1888. [4] The specific epithet melanosticta is from the Ancient Greek melanostiktos meaning "black-spotted". It combines melas meaning "black" and stiktos meaning "spotted". [5] The five members of genus Rhegmatorhina are sisters to the three species of genus Gymnopithys . [6] [2]

The hairy-crested antbird's taxonomy is unsettled. The International Ornithological Committee assigns it these four subspecies: [2]

The Clements taxonomy and BirdLife International's Handbook of the Birds of the World include R. m. badia within R. m. purusiana. [7] [8] Some taxonomists have suggested that more than one species is present, and specifically that R. m. brunneiceps should be treated as a separate species. [6]

This article follows the four-subspecies model.

Description

The hairy-crested antbird is 14 to 15 cm (5.5 to 5.9 in) long and weighs 29 to 33 g (1.0 to 1.2 oz). Both sexes have a large pale bluish white ring of bare skin around the eye, and adults have a bushy crest. Adult males of the nominate subspecies R. m. melanosticta have an olive-tinged gray crest. Their nape, the sides of their neck, and their upperparts, wings, and tail are olive-brown. The wing feathers have rufous edges and the tail is blackish towards its tip. Their lores, face, and throat are black and the rest of their underparts dark olive-brown. Adult females are like males with the addition of short black bars with cinnamon-rufous edges on their upper back feathers and wing coverts. Subadult males do not have a crest; their crown is blackish, their upperparts like adult females', and their underparts have some blackish feathers. Subspecies R. m. brunneiceps is more rufescent than the nominate, with a black-streaked rufous to light brown crown and darker underparts. R. m. purusiana and R. m. badia are somewhat variable but paler than the nominate, and females have smaller black bars on their back. [9] [10] [11] [12] [13]

Distribution and habitat

The subspecies of the hairy-crested antbird are found thus: [2] [9]

The hairy-crested antbird primarily inhabits the understorey of humid terra firme evergreen forest though it also occurs in transitional forest between it and seasonally flooded areas. In elevation it reaches 1,000 m (3,300 ft) in Colombia, 750 m (2,500 ft) in Ecuador, and 1,350 m (4,400 ft) in Peru. [9] [10] [11] [12] [13]

Behavior

Movement

The hairy-crested antbird is believed to be a year-round resident. [9]

Feeding

The hairy-crested antbird is an obligate ant follower that feeds on a variety of arthropods that flee foraging army ant swarms, such as those of Eciton burchelli . It typically forages individually, in pairs, and in family groups, perching within about 1 m (3 ft) of the ground and sallying or pouncing to the ground after prey. Several family groups may attend an ant swarm. It is dominant over smaller antbirds but subordinate to larger antbirds and species of other families such as woodcreepers. [9] [10] [11] [12] [13] [14]

Breeding

The hairy-crested antbird's breeding season in Peru spans at least September to December; its breeding season elsewhere is not known. Five nests discovered in Peru were cups or shallow beds, mostly made of strips of palm frond, and variably placed atop a stump or in a cavity. The usual clutch size is two pinkish eggs with brown to maroon spots and streaks. The one known period from hatch to fledging was 14 days. The incubation period and details of parental care are not known. [9]

Vocalization

One author described the hairy-crested antbird's song as a "slow series, starting with a few very high, sharp, fluted notes, then descending to a few drawn-out, grating notes". [12] Others describe it as "a short series of wheezy, somewhat nasal whistled notes, e.g., 'wheeeyr, wheer-wheer-wheer-wheer' with descending effect". [11] Its calls include a "harsh, vibrant 'chirr' [and an] abrupt 'chip' ". [9]

Status

The IUCN has assessed the hairy-crested antbird as being of Least Concern. It has a very large range; its population size is not known and is believed to be decreasing. No immediate threats have been identified. [1] It is generally considered uncommon though "rare to uncommon" in Peru, "scarce" in Ecuador, and "rarely encountered" in Colombia. [9] [10] [11] [13] It occurs in several large governmentally protected areas and in private preserves and "[e]xtensive unprotected intact habitat also exists throughout the range". [9]

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References

  1. 1 2 BirdLife International (2016). "Hairy-crested Antbird Rhegmatorhina melanosticta". IUCN Red List of Threatened Species . 2016: e.T22701895A93853406. doi: 10.2305/IUCN.UK.2016-3.RLTS.T22701895A93853406.en . Retrieved 26 May 2024.
  2. 1 2 3 4 Gill, Frank; Donsker, David; Rasmussen, Pamela, eds. (January 2024). "Antbirds". IOC World Bird List. v 14.1. Retrieved 4 January 2024.
  3. Sclater, Philip L.; Salvin, Osbert (1880). "On new birds collected by Mr. C. Buckley in Eastern Ecuador". Proceedings of the Zoological Society of London. 1880 (2): 155–161 [160].
  4. Ridgway, Robert (1887). "Descriptions of new species and genera of birds from the Lower Amazon". Proceedings of the United States National Museum. 10 (660): 516–528 [525]. doi:10.5479/si.00963801.660.516. Although the title page gives the year as 1887, the volume was not published until 1888.
  5. Jobling, James A. (2010). The Helm Dictionary of Scientific Bird Names. London: Christopher Helm. p. 248. ISBN   978-1-4081-2501-4.
  6. 1 2 Remsen, J. V., Jr., J. I. Areta, E. Bonaccorso, S. Claramunt, G. Del-Rio, A. Jaramillo, D. F. Lane, M. B. Robbins, F. G. Stiles, and K. J. Zimmer. Version 4 March 2024. A classification of the bird species of South America. American Ornithological Society. https://www.museum.lsu.edu/~Remsen/SACCBaseline.htm retrieved March 5, 2024
  7. Clements, J. F., P.C. Rasmussen, T. S. Schulenberg, M. J. Iliff, T. A. Fredericks, J. A. Gerbracht, D. Lepage, A. Spencer, S. M. Billerman, B. L. Sullivan, and C. L. Wood. 2023. The eBird/Clements checklist of birds of the world: v2023. Downloaded from https://www.birds.cornell.edu/clementschecklist/download/ retrieved October 28, 2023
  8. HBW and BirdLife International (2022) Handbook of the Birds of the World and BirdLife International digital checklist of the birds of the world. Version 7. Available at: https://datazone.birdlife.org/userfiles/file/Species/Taxonomy/HBW-BirdLife_Checklist_v7_Dec22.zip retrieved December 13, 2022
  9. 1 2 3 4 5 6 7 8 9 Zimmer, K. and M.L. Isler (2020). Hairy-crested Antbird (Rhegmatorhina melanosticta), version 1.0. In Birds of the World (J. del Hoyo, A. Elliott, J. Sargatal, D. A. Christie, and E. de Juana, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.hacant1.01 retrieved May 26, 2024
  10. 1 2 3 4 McMullan, Miles; Donegan, Thomas M.; Quevedo, Alonso (2010). Field Guide to the Birds of Colombia. Bogotá: Fundación ProAves. p. 140. ISBN   978-0-9827615-0-2.
  11. 1 2 3 4 5 Ridgely, Robert S.; Greenfield, Paul J. (2001). The Birds of Ecuador: Field Guide. Vol. II. Ithaca: Cornell University Press. pp. 430–431. ISBN   978-0-8014-8721-7.
  12. 1 2 3 4 van Perlo, Ber (2009). A Field Guide to the Birds of Brazil. New York: Oxford University Press. pp. 262–263. ISBN   978-0-19-530155-7.
  13. 1 2 3 4 Schulenberg, T.S., D.F. Stotz, D.F. Lane, J.P. O’Neill, and T.A. Parker III. 2010. Birds of Peru. Revised and updated edition. Princeton University Press, Princeton, New Jersey. Plate 173
  14. Willis, Edwin O. (1969). "On the behavior of five species of Rhegmatorhina, ant-following antbirds of the Amazon basin" (PDF). Wilson Bulletin. 81: 362–395.

Further reading