LC
Ruddy Treerunner Margarornis rubiginosus



Justification

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 <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 trend appears to be stable, and hence the species does not approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size may be moderately small to large, 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 is estimated to number fewer than 50,000 mature individuals (Partners in Flight 2019); thus it is here placed in the band 20,000-49,999 mature individuals. The species is described as 'fairly common' (Stotz et al. 1996).

Trend justification

The population trend has not been directly quantified. A remote-sensing study found that recent forest loss in the species's range was negligible (<1% over three generations; Tracewski et al. 2016). As the species seems to tolerate moderate forest fragmentation (del Hoyo et al. 2003), it is tentatively assessed as being stable.

Acknowledgements

Text account compilers
Hermes, C.

Contributors
Butchart, S., Ekstrom, J. & Palmer-Newton, A.


Recommended citation
BirdLife International (2022) Species factsheet: Margarornis rubiginosus. Downloaded from http://www.birdlife.org on 24/09/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 24/09/2022.