Data Zone
Justification of Red List category
Although this species may have a small range, it is not believed to approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence under 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). The population size has not been quantified, but it is not believed to approach the thresholds for Vulnerable under the population size criterion (under 10,000 mature individuals with a continuing decline estimated to be over 10% in ten years or three generations, or with a specified population structure). 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 (over 30% decline over ten years or three generations). 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 probably fairly numerous (Hilty 2003). This species is considered to have a high dependency on forest habitat, and tree cover is estimated to have declined by 1.5% within its mapped range over the past 10 years (Global Forest Watch 2022, using Hansen et al. [2013] data and methods disclosed therein). It is therefore tentatively suspected that this rate of cover loss may have led to a decline of between 1-19% in the species' population size over the same time frame, with a best estimate of reduction being less than 5%.
Trend justification
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This species occurs on cerros Guanay, Yaví and Sipapo in south Venezuela (Ridgely and Tudor 1989, Stattersfield et al. 1998, Stotz et al. 1996).
This species occurs in montane humid forest and forest edge at elevations of 900-2,250 m (Ridgely and Tudor 1989). Little is known of its ecology.
Owing to the largely inaccessible nature of the isolated tepuis region, its habitat remains relatively undisturbed (Huber and Alarcón 1988). However, many of the endemic plants of the tepuis harbour flammable secondary compounds which help to spread fire and, given its relatively small range, this could affect available habitat. Any such habitat loss would be absolute as montane forests on the tepuis tend not to regrow but be replaced by bracken Pteridium (Stattersfield et al. 1998).
Text account compilers
Rutherford, C.A.
Recommended citation
BirdLife International (2024) Species factsheet: White-faced Whitestart Myioborus albifacies. Downloaded from
https://datazone.birdlife.org/species/factsheet/white-faced-whitestart-myioborus-albifacies 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.