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 increasing, 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 estimated to number 160,000 mature individuals (Partners in Flight 2019).
Trend justification
This species has been increasing over the last 50 years in North America (Partners in Flight 2019). Short-term trends suggest that the population has increased by 65% over the past ten years (Pardieck et al. 2018).
Text account compilers
Bell, F., Hermes, C.
Contributors
Butchart, S., Ekstrom, J. & Miller, E.
Recommended citation
BirdLife International (2024) Species factsheet: Swainson's Warbler Limnothlypis swainsonii. Downloaded from
https://datazone.birdlife.org/species/factsheet/swainsons-warbler-limnothlypis-swainsonii 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.