Brown-capped vireo

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Brown-capped vireo
Brown-capped Vireo - South Ecuador S4E8717 (22991156292).jpg
Brown-capped vireo Vireo leucophrys vocalization
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Passeriformes
Family: Vireonidae
Genus: Vireo
Species:
V. leucophrys
Binomial name
Vireo leucophrys
(Lafresnaye, 1844)
Vireo leucophrys map.svg
Synonyms

Vireo gilvus leucophrys

The brown-capped vireo (Vireo leucophrys) is a small passerine bird in the family Vireonidae, the vireos, greenlets, and shrike-babblers. It is found in Mexico, much of Central America, and in South America from Venezuela to Bolivia. [2]

Contents

Taxonomy and systematics

The brown-capped vireo was originally described in 1844 as Hylophilus leucophrys. [3] For much of the twentieth century it was treated as conspecific with the warbling vireo (Vireo gilvus). [4]

The brown-capped vireo's further taxonomy is unsettled. The IOC, AviList, and BirdLife International's Handbook of the Birds of the World assign it these 14 subspecies: [2] [5] [6]

However, the Clements taxonomy does not recognize V. l. dubius, V. l. palmeri, and V. l. costaricensis. It includes V. l. dubius within V. l. eleanorae, V. l. palmeri within V. l. strenuus, and V. l. costaricensis within V. l. chiriquensis. In addition it calls V. l. eleanorae, V. l. bulli, V. l. amauronotus, and V. l. strenuus the "(northern) amauronotus group" and the other subspecies the "(southern) leucophrys group" within the species. [7]

This article follows the 14-subspecies model.

Description

The brown-capped vireo is 11.5 to 12.5 cm (4.5 to 4.9 in) long and weighs about 12 to 13.5 g (0.42 to 0.48 oz). The sexes have the same plumage. Adults of the nominate subspecies V. l. leucophrys have an olive-brown crown, a white supercilium, a dusky spot on their lores, a dusky streak behind the eye, and grayish white ear coverts. Their upperparts, wings, and tail are grayish olive to brownish olive-green with yellow edges on the wing coverts. Their throat and upper breast are grayish white and the rest of their underparts pale yellow. [8]

The other subspecies of the brown-capped vireo differ from the nominate and each other thus: [8]

All subspecies have a brown iris, a dark brown, gray, or black maxilla, a horn or whitish mandible with a blue-gray streak, and blue gray or bluish gray legs and feet. [8]

Distribution and habitat

The subspecies of the brown-capped vireo are found thus: [8]

The brown-capped vireo inhabits forested landscapes in the subtropical and temperate zones. [9] These include humid montane forest, mature secondary forest, and coffee plantations. [8] [9] In northern Central America it occurs in cloudforest and pine-oak and oak forest. [10] It ranges in elevation between 1,200 and 2,000 m (3,900 and 6,600 ft) in Mexico [11] , up to about 1,550 m (5,100 ft) in northern Central America [10] , between 1,500 and 2,500 m (4,900 and 8,200 ft) in Costa Rica [12] , mostly between 700 and 2,500 m (2,300 and 8,200 ft) in Venezuela [13] , between 600 and 2,700 m (2,000 and 8,900 ft) in Colombia [14] , mostly between 1,300 and 2,600 m (4,300 and 8,500 ft) but down to 600 m (2,000 ft) in the southwest in Ecuador [15] , between 1,100 and 2,600 m (3,600 and 8,500 ft) in Peru [16] , and between 600 and 2,500 m (2,000 and 8,200 ft) in Bolivia [17] . There is one record at 500 m (1,600 ft) in Venezuela. [18]

Behavior

Movement

The brown-capped vireo is a year-round resident. [9]

Feeding

The brown-capped vireo feeds primarily on insects and includes smaller amounts of berries in its diet, though details are lacking. It forages singly or in pairs and usually as part of a mixed-species feeding flock. It takes most prey in the upper levels of the forest and even of isolated trees. It is often seen hanging upside-down to glean or probe for prey. [8]

Breeding

The brown-capped vireo's breeding season has not been defined but it appears to span at least March to July in parts of Mexico and in Costa Rica. It includes May and July in Ecuador, where the only two known nests were found. The nests were cups made from plant fibers and moss suspended in branch forks, and both were about 8 m (25 ft) above the ground. One held two nestlings that were being fed by both parents. The usual clutch size, incubation period, time to fledging, and other details of parental care are not known. [8]

Vocalization

The brown-capped vireo's song has been described as "a short, sweet 2.5-3-sec. warble, similar to Warbling Vireo song" [10] , "a silky, ripping, and somewhat hurried little refrain, here you sée me hear me sing so swéet" [13] , and "a hesitating, pleasant warble of variable pattern...wurlze-wee-wee wurzle-weezle-wee wurzle-wee" [16] . One description of its call is "a wheezing, descending zreeEEEEw". [16]

Status

The IUCN has assessed the brown-capped vireo as being of Least Concern. It has a very large range; its estimated population of at least 50,000 mature individuals is believed to be decreasing. No immediate threats have been identified. [1] It is considered uncommon in northern Central America, fairly common in Costa Rica, common in Venezuela and Colombia, "widespread and often numerous" in Ecuador, and fairly common in Peru. [10] [12] [13] [14] [15] [16] "Human activity probably has little short term effect on [the] Brown-capped Vireo." [8]

References

  1. 1 2 BirdLife International (2021). "Brown-capped Vireo Vireo leucophrys". IUCN Red List of Threatened Species . 2021 e.T22705273A139911977. doi: 10.2305/IUCN.UK.2021-3.RLTS.T22705273A139911977.en . Retrieved 26 November 2025.
  2. 1 2 Gill, Frank; Donsker, David; Rasmussen, Pamela, eds. (March 2025). "Vireos, shrike-babblers". IOC World Bird List. v 15.1. Retrieved 3 March 2025.
  3. ↑ de Lafresnaye, Frédéric (1844). "Nouvelles espéces d'oiseaux de Colombie". Revue zoologique (in Latin and French). Société cuvierienne: 81. Retrieved November 26, 2025.
  4. ↑ Remsen, J. V., Jr., J. I. Areta, E. Bonaccorso, S. Claramunt, D. F. Lane, L, N. Naka, M. B. Robbins, F. G. Stiles, and K. J. Zimmer. Version 29 September 2025. A classification of the bird species of South America. South American Classification Committee associated with the International Ornithologists' Union. https://www.museum.lsu.edu/~Remsen/SACCBaseline.htm retrieved September 29, 2025
  5. ↑ AviList Core Team. 2025. AviList: The Global Avian Checklist, v2025. https://doi.org/10.2173/avilist.v2025 retrieved June 11, 2025
  6. ↑ HBW and BirdLife International (2025). Handbook of the Birds of the World and BirdLife International digital checklist of the birds of the world. Version 10. Available at: https://datazone.birdlife.org/about-our-science/taxonomy#birdlife-s-taxonomic-checklist retrieved October 12, 2025
  7. ↑ Clements, J. F., P. C. Rasmussen, T. S. Schulenberg, M. J. Iliff, J. A. Gerbracht, D. Lepage, A. Spencer, S. M. Billerman, B. L. Sullivan, M. Smith, and C. L. Wood. 2025. The eBird/Clements checklist of Birds of the World: v2025. Downloaded from https://www.birds.cornell.edu/clementschecklist/download/ retrieved November 3, 2025
  8. 1 2 3 4 5 6 7 8 Rodríguez-Flores, C. I., C. A. Soberanes-González, M. d. C. Arizmendi, and T. S. Schulenberg (2020). Brown-capped Vireo (Vireo leucophrys), version 1.0. In Birds of the World (T. S. Schulenberg, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.brcvir1.01 retrieved November 26, 2025
  9. 1 2 3 Check-list of North American Birds (7th ed.). Washington, D.C.: American Ornithologists' Union. 1998. pp. 436–437.
  10. 1 2 3 4 Fagan, Jesse; Komar, Oliver (2016). Field Guide to Birds of Northern Central America. Peterson Field Guides. Boston: Houghton Mifflin Harcourt. pp. 288–289. ISBN   978-0-544-37326-6.
  11. ↑ Howell, S. N. G., and S. Webb (1995). A Guide to the Birds of Mexico and Northern Central America. Oxford University Press, New York, NY, USA.
  12. 1 2 Garrigues, Richard; Dean, Robert (2007). The Birds of Costa Rica. Ithaca: Zona Tropical/Comstock/Cornell University Press. pp. 226–227. ISBN   978-0-8014-7373-9.
  13. 1 2 3 Hilty, Steven L. (2003). Birds of Venezuela (second ed.). Princeton NJ: Princeton University Press. p. 506.
  14. 1 2 McMullan, Miles; Donegan, Thomas M.; Quevedo, Alonso (2010). Field Guide to the Birds of Colombia. Bogotá: Fundación ProAves. p. 177. ISBN   978-0-9827615-0-2.
  15. 1 2 Ridgely, Robert S.; Greenfield, Paul J. (2001). The Birds of Ecuador: Field Guide. Vol. II. Ithaca: Cornell University Press. pp. 568–569. ISBN   978-0-8014-8721-7.
  16. 1 2 3 4 Schulenberg, T.S.; Stotz, D.F.; Lane, D.F.; O'Neill, J.P.; Parker, T.A. III (2010). Birds of Peru. Princeton Field Guides (revised and updated ed.). Princeton, NJ: Princeton University Press. p. 676. ISBN   978-0691130231.
  17. ↑ Hennessey, B., S. K. Herzog, and F. Sagot. 2003. Lista anotada de las aves de Bolivia. Asociación Armonia, Santa Cruz de la Sierra, Bolivia.
  18. ↑ Strewe, Ralf & Navarro, Cristobal (2004) "New and noteworthy records of birds from the Sierra Nevada de Santa Marta region, north-eastern Colombia". Bull. B.O.C. 124(1): 38–51. PDF fulltext
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