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

Justification of Red List category
Although this species may have a restricted 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 this species is described as 'uncommon' (Stotz et al. 1996). The population is suspected to be in decline owing to changing agricultural practices, increased use of fire and a shift from farming camelids to farming sheep, all of which have led to the degradation and destruction of polylepis woodlands (del Hoyo et al. 2001).

Trend justification
The population is suspected to be in decline owing to changing agricultural practices, increased use of fire and a shift from farming camelids to farming sheep, all of which have led to the degradation and destruction of polylepis woodlands (del Hoyo et al. 2001).

Text account compilers
Rutherford, C.A.

Recommended citation
BirdLife International (2024) Species factsheet: Bronze-tailed Thornbill Chalcostigma heteropogon. Downloaded from https://datazone.birdlife.org/species/factsheet/bronze-tailed-thornbill-chalcostigma-heteropogon on 22/11/2024.
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 22/11/2024.