Data Zone
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 extremely 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.
Trend justification
This species has had stable population trends over the last 40 years in North America (data from Breeding Bird Survey and/or Christmas Bird Count: Butcher and Niven 2007).
Passerella unalaschcensis breeds from the Aleutian Islands along the western coasts of Canada and the northern United States, migrating to the south western coast of the United States.
Text account compilers
Butchart, S., Derhé, M. & Ekstrom, J.
Recommended citation
BirdLife International (2024) Species factsheet: Sooty Fox-sparrow Passerella unalaschcensis. Downloaded from
https://datazone.birdlife.org/species/factsheet/sooty-fox-sparrow-passerella-unalaschcensis on 27/11/2024.
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 27/11/2024.