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Grey-throated Warbler Basileuterus cinereicollis

Justification
This species is classified as Near Threatened owing to deforestation in its narrow altitudinal range which is likely to be leading to moderately rapid population declines. Were forest clearance and degradation to increase in intensity, it might be appropriate to uplist it to Vulnerable.

Taxonomic source(s)
SACC. 2006. A classification of the bird species of South America. Available at: #http://www.museum.lsu.edu/~Remsen/SACCBaseline.html#.

Distribution and population
Basileuterus cinereicollis is local and uncommon to rare throughout most of its disjunct range in the Andes of extreme west Venezuela (western Mérida and Táchira) and north-east Colombia (south to Cundinamaca and west Meta); it is fairly common in the Sierra de Perijá on the Colombia-Venezuela border (Ridgely and Tudor 1989, Curson et al. 1994, C. J. Sharpe in litt. 2011), but its habitat on these slopes has now been severely degraded below 2,000 m (C. J. Sharpe in litt. 2000).

Population justification
The global population size has not been quantified, but this species has been described as uncommon and rare and/or local.

Trend justification
The recorded decline is a result of habitat destruction and degradation, particularly for the cultivation of coffee.

Ecology
It is found in the dense understory in montane evergreen forest undergrowth, forest edge and secondary growth at 800-2,100 m (Parker et al. 1996, Stattersfield et al. 1998, Stiles et al. 1999, Hilty 2003).

Threats
The Colombian East Andes have been extensively degraded with progressive deforestation of its lower montane habitats, largely for intensive agricultural cultivation and pasture (Wege and Long 1995, Stattersfield et al. 1998). Understorey removal for shade-coffee production is perhaps the most important threat at present (Wege and Long 1995). In Venezuela, the Sierra de Mérida is also being cleared as a result of commercial and subsistence agricultural colonisation (Stattersfield et al. 1998).

Conservation Actions Underway
None is known. Conservation Actions Proposed
Regularly monitor the species at selected sites across its range to determine trends. Research the effects of understorey removal and other forms of habitat degradation on populations of the species. Protect significant areas of forest, in both strictly protected areas and community zoned multiple use areas.

References
Curson, J.; Quinn, D.; Beadle, D. 1994. New World warblers. A&C Black/Christopher Helm, London.

Hilty, S. L. 2003. Birds of Venezuela. A&C Black, London.

Parker, T. A.; Stotz, D. F.; Fitzpatrick, J. W. 1996. Ecological and distributional databases. In: Stotz, D.F.; Fitzpatrick, J.W.; Parker, T.A.; Moskovits, D.K. (ed.), Neotropical bird ecology and conservation, pp. 113-436. University of Chicago Press, Chicago.

Ridgely, R. S.; Tudor, G. 1989. The birds of South America. University of Texas Press, Austin, Texas.

Stattersfield, A. J.; Crosby, M. J.; Long, A. J.; Wege, D. C. 1998. Endemic bird areas of the world: priorities for bird conservation. BirdLife International, Cambridge, U.K.

Stiles, F. G.; Rosselli, L.; Bohórquez, C. I. 1999. New and noteworthy records of birds from the middle Magdalena valley of Colombia. Bulletin of the British Ornithologists' Club 119: 113-129.

Stotz, D. F.; Fitzpatrick, J. W.; Parker, T. A.; Moskovits, D. K. 1996. Neotropical birds: ecology and conservation. University of Chicago Press, Chicago.

Wege, D. C.; Long, A. J. 1995. Key Areas for threatened birds in the Neotropics. BirdLife International, Cambridge, U.K.

Further web sources of information
Explore HBW Alive for further information on this species

Search for photos and videos, and hear sounds of this species from the Internet Bird Collection

Text account compilers
Capper, D., Clay, R., Mahood, S., O'Brien, A., Sharpe, C J

Contributors
Cortes, O., Sharpe, C J

IUCN Red List evaluators
Butchart, S., Symes, A.

Recommended citation
BirdLife International (2014) Species factsheet: Basileuterus cinereicollis. Downloaded from http://www.birdlife.org on 02/09/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 02/09/2014.

This information is based upon, and updates, the information published in BirdLife International (2000) Threatened birds of the world. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife International, BirdLife International (2004) Threatened birds of the world 2004 CD-ROM and BirdLife International (2008) Threatened birds of the world 2008 CD-ROM. These sources provide the information for species accounts for the birds on the IUCN Red List.

To provide new information to update this factsheet or to correct any errors, please email BirdLife

To contribute to discussions on the evaluation of the IUCN Red List status of Globally Threatened Birds, please visit BirdLife's Globally Threatened Bird Forums.

Additional resources for this species

ARKive species - Grey-throated warbler (Basileuterus cinereicollis) 0

Key facts
Current IUCN Red List category Near Threatened
Family Parulidae (New World warblers)
Species name author Sclater, 1865
Population size Unknown mature individuals
Population trend Decreasing
Distribution size (breeding/resident) 36,300 km2
Country endemic? No
Links to further information
- Additional Information on this species