Cherrie's antwren

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Cherrie's antwren
Myrmotherula cherriei - Cherrie's antwren (male) , Novo Airao, Amazonas, Brazil.jpg
Male at Anavilhanas National Park, Novo Airão, Amazonas state, Brazil
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Passeriformes
Family: Thamnophilidae
Genus: Myrmotherula
Species:
M. cherriei
Binomial name
Myrmotherula cherriei
Myrmotherula cherriei map.svg

Cherrie's antwren (Myrmotherula cherriei) is a species of bird in subfamily Thamnophilinae of family Thamnophilidae, the "typical antbirds". [2] It is found in Brazil, Colombia, Peru, and Venezuela. [3]

Contents

Taxonomy and systematics

Cherrie's antwren is monotypic. [2] Its closest relative is believed to be the Pacific antwren (M. pacifica). [4]

The species' English name and specific epithet honor the American naturalist, explorer, and adventurer George Cherrie. [5] Dr. Cherrie accompanied former President Theodore Roosevelt in the famous 1913 exploration of the River of Doubt, in the Brazilian Amazon basin, which was later named Rio Roosevelt.

Description

Cherrie's antwren is 9 to 10 cm (3.5 to 3.9 in) long and weighs 7.5 to 9 g (0.26 to 0.32 oz). It is a smallish bird with a tiny tail. Adult males have a black and white streaked face. Their crown, back, and rump are black with white streaks. They have a narrow white patch between the shoulders. Their tail is black with white edges and tips to the feathers. Their wings are black with white tips on the coverts and white edges on the flight feathers. Their throat, breast, and belly are white and their flanks and crissum grayer. Black streaks extend from the throat to the flanks and belly. Adult females have buff streaks (not white) on the head. They lack the white patch between the shoulders. Their underparts are pale buff with thinner black streaks than the male's. [6] [7] [8]

Distribution and habitat

Cherrie's antwren has a disjunct distribution. The much larger part of its range extends from southeastern Colombia east through southwestern Venezuela into the watersheds of the Rio Negro and its tributary Rio Branco in Brazil. A separate population is found in northeastern Peru's Department of Loreto. The species inhabits a variety of landscapes. In much of its range it occurs in the understorey and mid-storey of stunted shrubby woodlands on white-sand soil. It also occurs in gallery forest within savanna, especially in Colombia. In Brazil it occurs in várzea , and along the Rio Negro appears to greatly favor thickets on islands, sandbars, and beside lagoons. In Peru it occurs along the edges of streams and lagoons. [6] [7] [8]

Behavior

Movement

Cherrie's antwren is believed to be a year-round resident throughout its range. [6]

Feeding

Cherrie's antwren feeds on arthropods, especially insects and spiders. It typically forages singly or in pairs and often joins mixed-species feeding flocks. It mostly feeds in dense foliage between about 1 and 7 m (3 and 20 ft) above the ground, though sometimes as high as 10 m (35 ft). It actively seeks prey among leaves and vine tangles and along branches, gleaning by reaching, lunging, and with brief sallies from a perch. [6] [7] [8]

Breeding

Only a few nests of Cherrie's antwren are known. They were seen in Brazil in September, in February in Colombia, and in April also in Colombia. They were a deep cup or pouch of plant fibers and (in one) fungal rhizomorphs. One was hung over water and another over land close to water. The only known clutch was of two eggs. It appears that both parents provision nestlings. The incubation period, time to fledging, and other details of parental care are not known. [6]

Vocalization

The song of Cherrie's antwren is a "short, very high, sharp, rattling trill, slightly rising at start". Its call is a "high, nasal 'tjeew' or 'teetjuw' ". [7]

Status

The IUCN has assessed Cherrie's antwren as being of Least Concern. It has a large range; its population size is not known and is believed to be decreasing. No immediate threats have been identified. [1] It is considered locally fairly common but patchily distributed, and occurs in a few protected areas. Its sandy soil habitat in Brazil is little affected by human encroachment, but in Peru it is "heavily exploited by expanding human populations". [6]

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References

  1. 1 2 BirdLife International (2016). "Cherrie's Antwren Myrmotherula cherriei". IUCN Red List of Threatened Species . 2016: e.T22701451A93830165. doi: 10.2305/IUCN.UK.2016-3.RLTS.T22701451A93830165.en . Retrieved 8 February 2024.
  2. 1 2 Gill, Frank; Donsker, David; Rasmussen, Pamela, eds. (January 2024). "Antbirds". IOC World Bird List. v 14.1. Retrieved January 4, 2024.
  3. 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 26 November 2023. Species Lists of Birds for South American Countries and Territories. https://www.museum.lsu.edu/~Remsen/SACCCountryLists.htm retrieved November 27, 2023
  4. Isler, M.L., Isler, P.R. and Whitney, B.M. (1999). Species limits in antbirds (Passeriformes: Thamnophilidae): the Myrmotherula surinamensis complex. Auk 116(1): 83–96.
  5. Beolens, Bo; Watkins, Michael (2003). Whose Bird? Men and Women Commemorated in the Common Names of Birds. London: Christopher Helm. p. 83.
  6. 1 2 3 4 5 6 Zimmer, K., M.L. Isler, and E. de Juana (2020). Cherrie's Antwren (Myrmotherula cherriei), 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.cheant1.01 retrieved February 8, 2024
  7. 1 2 3 4 van Perlo, Ber (2009). A Field Guide to the Birds of Brazil. New York: Oxford University Press. pp. 240–241. ISBN   978-0-19-530155-7.
  8. 1 2 3 McMullan, Miles; Donegan, Thomas M.; Quevedo, Alonso (2010). Field Guide to the Birds of Colombia. Bogotá: Fundación ProAves. p. 133. ISBN   978-0-9827615-0-2.

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