Bolivian recurvebill

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Bolivian recurvebill
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Passeriformes
Family: Furnariidae
Genus: Syndactyla
Species:
S. striata
Binomial name
Syndactyla striata
(Carriker, 1935)
Syndactyla striata map.svg

The Bolivian recurvebill (Syndactyla striata) is a bird species in the Furnariinae subfamily of the ovenbird family Furnariidae. [2] It is found in Bolivia and Peru. [3]

Contents

Taxonomy and systematics

The Bolivian recurvebill and its sister species the Peruvian recurvebill (S. ucayalae) were previously placed in genus Simoxenops. Their vocalizations and behavior strongly suggested the two species belonged in Syndactyla, and that placement was confirmed by genetic study. [4] [5]

The Bolivian recurvebill is monotypic. [2]

Description

The Bolivian recurvebill is 19 to 20 cm (7.5 to 7.9 in) long and weighs 37.5 to 48.5 g (1.3 to 1.7 oz). It is a largish furnariid with a heavy, wedge-shaped, somewhat upturned, bill. The sexes have the same plumage. Adults have a buff supercilium on a mostly grizzled brownish and rufous face. Their crown and back are dark rich reddish brown with dark buff streaks. Their rump is slightly paler than the back and minimally streaked, and their uppertail coverts are dark chestnut. Their wings are dark rich reddish brown with ochraceous at the bend. Their tail is dull chestnut. Their throat and malar area are orange-rufous with faint paler spots at the throat's lower edge, their breast and upper belly blurrily streaked with orange-rufous and brown, and their lower belly a minimally streaked rich brown. Their undertail coverts are chestnut-brown with ochraceous streaks. Their iris is dark, their bill gray, and their legs and feet grayish. [6]

Distribution and habitat

The Bolivian recurvebill is found in the Andean foothills of far southeastern Peru and western and central Bolivia. [3] [6] [7] (Some taxonomic systems list it as endemic to Bolivia. [2] [8] ) It inhabits humid forest in the foothills and lower montane zone at elevations between 650 and 1,700 m (2,100 and 5,600 ft). Though it is not a bamboo obligate, it is strongly associated with areas where Guadua bamboo is common to abundant. [6]

Behavior

Movement

The Bolivian recurvebill is a year-round resident throughout its range. [6]

Feeding

The Bolivian recurvebill feeds on arthropods. It regularly joins mixed-species feeding flocks. It mostly forages in dense undergrowth in the forest's understory, but will rarely also feed up to the subcanopy. It finds its prey by gleaning, pecking, and probing dead branches, debris, and epiphytes. [6]

Breeding

Nothing is known about the Bolivian recurvebill's breeding biology. [6]

Vocalization

The Bolivian recurvebill's song is "a harsh, staccato, rattling, ascending series that levels in pitch and then ends abruptly". Its calls are "a raspy 'chet' and nasal, scolding 'naah' ". [6]

Status

The IUCN originally assessed the Bolivian recurvebill as Vulnerable, then in 2008 as Near Threatened, and since 2012 as being of Least Concern. Its "range and abundance have been recently [1992] studied, and it has been found to be more widely distributed and commoner than previously thought". Its population size is not known and is believed to be decreasing. The principal threat is deforestation for agriculture and human settlement, and through logging and mining operations. "Nonetheless, this species appears to adapt well to habitat modification and large extensions of pristine forest remain in inaccessible areas within the species' elevational range" [1] It occurs in several protected areas. [6]

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References

  1. 1 2 BirdLife International (2016). "Bolivian Recurvebill Syndactyla striata". IUCN Red List of Threatened Species . 2016: e.T22702878A93893365. doi: 10.2305/IUCN.UK.2016-3.RLTS.T22702878A93893365.en . Retrieved 1 September 2023.
  2. 1 2 3 Gill, Frank; Donsker, David; Rasmussen, Pamela, eds. (July 2023). "Ovenbirds, woodcreepers". IOC World Bird List. v 13.2. Retrieved July 31, 2023.
  3. 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 31 May 2023. Species Lists of Birds for South American Countries and Territories. https://www.museum.lsu.edu/~Remsen/SACCCountryLists.htm retrieved May 31, 2023
  4. Robbins, M.B. and Zimmer, K.J. (2005). Taxonomy, vocalisations and natural history of Philydor dimidiatum (Furnariidae), with comments on the systematics of Syndactyla and Simoxenops. Bull. Brit. Orn. Club 125(3): 212–228.
  5. Derryberry, E. P., S. Claramunt, G. Derryberry, R. T. Chesser, J. Cracraft, A. Aleixo, J. Pérez-Emán, J. V. Remsen, Jr., and R. T. Brumfield. (2011). Lineage diversification and morphological evolution in a large-scale continental radiation: the Neotropical ovenbirds and woodcreepers (Aves: Furnariidae). Evolution 65(10):2973–2986.
  6. 1 2 3 4 5 6 7 8 Remsen, Jr., J. V. and C. J. Sharpe (2020). Bolivian Recurvebill (Syndactyla striata), 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.bolrec1.01 retrieved September 1, 2023
  7. Herzog, S.K., Hennessey, A.B., Kessler, M. and García-Solíz, V.H. (2008). Distribution, natural history and conservation status of two endemics of the Bolivian Yungas, Bolivian Recurvebill Simoxenops striatus and Yungas Antwren Myrmotherula grisea. Bird Conserv. Int. 18(4): 331–348.
  8. Clements, J. F., T. S. Schulenberg, M. J. Iliff, T. A. Fredericks, J. A. Gerbracht, D. Lepage, S. M. Billerman, B. L. Sullivan, and C. L. Wood. 2022. The eBird/Clements checklist of birds of the world: v2022. Downloaded from https://www.birds.cornell.edu/clementschecklist/download/ retrieved November 10, 2022