This species has a very 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 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.
AERC TAC. 2003. AERC TAC Checklist of bird taxa occurring in Western Palearctic region, 15th Draft. Available at: #http://www.aerc.eu/DOCS/Bird_taxa_of _the_WP15.xls#.
Cramp, S.; Perrins, C. M. 1977-1994. Handbook of the birds of Europe, the Middle East and Africa. The birds of the western Palearctic. Oxford University Press, Oxford.
del Hoyo, J.; Collar, N. J.; Christie, D. A.; Elliott, A.; Fishpool, L. D. C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Barcelona, Spain and Cambridge UK: Lynx Edicions and BirdLife International.
Anser caerulescens (del Hoyo and Collar 2014) was previously placed in the genus Chen.
Anser caerulescens Cramp and Simmons (1977-1994), Anser caerulescens Sibley and Monroe (1990, 1993), Anser caerulescens Stotz et al. (1996), Chen caerulescens (Linnaeus, 1758)
Related state of the world's birds case studies
Delany, S.; Scott, D. 2006. Waterbird population estimates. Wetlands International, Wageningen, The Netherlands.
Murphy-Klassen, H. M.; Underwood, T. J.; Sealy, S. G.; Czyrny, A. A. 2005. Long-term trends in spring arrival dates of migrant birds at Delta Marsh, Manitoba, in relation to climate change. The Auk 122: 1130-1148.
Further web sources of information
Detailed regional assessment and species account from the European Red List of Birds (BirdLife International, 2015)
Text account compilers
Ekstrom, J., Butchart, S.
IUCN Red List evaluators
Butchart, S., Symes, A.
BirdLife International (2015) Species factsheet: Anser caerulescens. Downloaded from http://www.birdlife.org on 01/08/2015. Recommended citation for factsheets for more than one species: BirdLife International (2015) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 01/08/2015.
To provide new information to update this factsheet or to correct any errors, please email BirdLife
Additional resources for this species
|Current IUCN Red List category||Least Concern|
|Family||Anatidae (Ducks, Geese, Swans)|
|Species name author||(Linnaeus, 1758)|
|Population size||mature individuals|
|Distribution size (breeding/resident)||581,000 km2|
|Links to further information|
- Additional Information on this species|
- 2015 European Red List assessment