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 under 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 size is very large, and hence does not approach the thresholds for Vulnerable under the population size criterion (under 10,000 mature individuals with a continuing decline estimated to be over 10% in ten years or three generations, or with a specified population structure). The population trend appears to be stable, and hence the species does not approach the thresholds for Vulnerable under the population trend criterion (over 30% decline over ten years or three generations). For these reasons the species is evaluated as Least Concern.
Population justification
The global population size is estimated at 101,500-1,002,700 individuals (Wetlands International 2023), which equates to 67,700-668,000 mature individuals. The overall population trend is considered to be stable over three generations (11.13 years) (Wetlands International 2023).
Trend justification
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Text account compilers
Rutherford, C.A.
Recommended citation
BirdLife International (2024) Species factsheet: Chiloe Wigeon Mareca sibilatrix. Downloaded from
https://datazone.birdlife.org/species/factsheet/chiloe-wigeon-mareca-sibilatrix 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.