• Summary
• Text account
• Data table and detailed info
• Distribution map
• Reference and further resources

Justification of Red List category
This species has a very large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km² combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). Despite the fact that the population trend appears to be decreasing, the decline is not believed to be sufficiently rapid to approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size has not been quantified, but it is not believed to approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.

Population justification
The global population size has not been quantified, but the species is described as uncommon and rare to locally common (Curson 2020, T. Donegan in litt. 2023). It is patchily distributed within its range (T. Donegan in litt. 2023).

Trend justification
The species is reportedly becoming rarer in lower elevations as a consequence of forest loss (Curson 2020). Tree cover loss within the range is low (2% over ten years; Global Forest Watch 2022, using Hansen et al. [2013] data and methods disclosed therein). Population declines are therefore likely equally low and localised; they are here tentatively placed in the band 1-9% over ten years. The rate of population decline may however vary across the range and locally be higher (per E. Botero-Delgadillo in litt. 2023, T. Donegan in litt. 2023).

The species occurs from the Sierra de Perijá along the border of Colombia and Venezuela and Cordillera de Merida, Venezuela, south to Cundinamarca and Meta in Colombia.

It is found in the dense understory in montane evergreen forest undergrowth, forest edge and secondary growth with undisturbed understory (Parker et al. 1996, Stattersfield et al. 1998, Stiles et al. 1999, Hilty 2003, Curson 2020). Its ecology is not well known.

Forests within the range are cleared and degraded, largely for agricultural cultivation, pasture and colonisation (Wege and Long 1995, Stattersfield et al. 1998). Understory removal for shade-coffee production is perhaps the most important threat at present (Wege and Long 1995).

Conservation Actions Underway
None is known.

Conservation Actions Proposed
Quantify the population size. Research the effects of understorey removal and other forms of habitat degradation on the population size. Regularly monitor the population to determine trends. Protect areas of suitable habitat within the range.

Text account compilers
Hermes, C.

Contributors
Botero-Delgadillo, E., Capper, D., Clay, R.P., Cortés, O., Donegan, T., Mahood, S., O'Brien, A. & Sharpe, C J

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Recommended citation
BirdLife International (2024) Species factsheet: Grey-throated Warbler Myiothlypis cinereicollis. Downloaded from https://datazone.birdlife.org/species/factsheet/grey-throated-warbler-myiothlypis-cinereicollis on 23/12/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org/species/search on 23/12/2024.