Justification of Red List category
This species has an extremely 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). 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 is very large, and hence does not 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 suspected to number 500,000-4,999,999 mature individuals (Partners in Flight 2022). The species is described as 'uncommon' (Stotz et al. 1996).
Trend justification
The population trend is difficult to determine, as the degradation of primary forests may benefit populations inhabiting secondary growth and dry woodland, while it may threaten populations in mangroves (Robbins 2020). Tree cover loss is low within the range (4% over ten years; Global Forest Watch 2022, using Hansen et al. [2013] data and methods disclosed therein); consequently, this may not currently be affecting the overall population. Tentatively, the population is assessed as stable.
The impact of deforestation on the population are unclear, as the degradation of primary forests may benefit populations inhabiting secondary growth and dry woodland, while it may threaten populations in mangroves (Robbins 2020).
Text account compilers
Hermes, C., Wheatley, H.
Contributors
Butchart, S., Ekstrom, J. & Palmer-Newton, A.
Recommended citation
BirdLife International (2024) Species factsheet: Northern Scrub-flycatcher Sublegatus arenarum. Downloaded from
https://datazone.birdlife.org/species/factsheet/northern-scrub-flycatcher-sublegatus-arenarum on 22/12/2024.
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 22/12/2024.