Justification of Red List category
Despite its restricted range, and the fact that the population may be declining, the species is not thought to approach the threshold for listing as Vulnerable under any criterion. Therefore, the species is listed as Least Concern.
The global population size has not been quantified, although it has been described as uncommon. However, it may be more common than suggested by field observations, owing to its secretive habits (del Hoyo et al. 2007).
This species is suspected to be declining at an unquantified rate owing to habitat destruction (del Hoyo et al. 2007, R. Hutchinson in litt. 2010).
Robsonius thompsoni is found in northern Luzon, Philippines.
Logging within its elevational range has been described as extensive (del Hoyo et al. 2007).
Text account compilers
Allinson, T, Calvert, R., Symes, A., Taylor, J., Martin, R & Westrip, J.
Allen, D., Gonzalez, J., Hosner, P. & Hutchinson, R.
BirdLife International (2023) Species factsheet: Robsonius thompsoni. Downloaded from http://datazone.birdlife.org/species/factsheet/sierra-madre-ground-warbler-robsonius-thompsoni on 30/11/2023.
Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from http://datazone.birdlife.org on 30/11/2023.