Emperor Goose Anser canagicus


Taxonomic note
Anser canagicus (del Hoyo and Collar 2014) was previously placed in the genus Chen.

Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
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.

IUCN Red List criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - -

Red List history
Year Category Criteria
2016 Near Threatened A2de+4cde
2012 Near Threatened A2de+4cde
2008 Near Threatened A2b,d,e
2006 Near Threatened
2004 Near Threatened
2000 Lower Risk/Near Threatened
1994 Lower Risk/Least Concern
1988 Lower Risk/Least Concern
Species attributes

Migratory status full migrant Forest dependency does not normally occur in forest
Land-mass type Land-mass type - continent
Average mass -

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 775,000 medium
Extent of Occurrence non-breeding (km2) 2,530,000 medium
Severely fragmented? no -
Population and trend
Value Data quality Derivation Year of estimate
Number of mature individuals medium estimated 2001
Population trend decreasing medium suspected 2003-2030
Decline % (10 years/3 generations future) 10-19 - - -
Decline % (10 years/3 generations past and future) 20-29 - - -
Generation length (years) 8.9 - - -

Population justification: The global population is estimated to number > c.85,000 individuals (U.S. Fish and Wildlife Service 2001), while the population in Russia has been estimated at c.100-10,000 breeding pairs (Brazil 2009).

Trend justification: The population trend is unclear, with increasing trends in North America as measured using data from the Breeding Bird Survey and/or Christmas Bird Count (Butcher and Niven 2007), but a moderately rapid decline is suspected to have occurred overall, with at least a moderate decline expected in the future as a result of climate change.

Country/territory distribution
Country/Territory Presence Origin Resident Breeding Non-breeding Passage
Canada extant vagrant yes
Japan extant vagrant
Russia extant native yes
Russia (Asian) extant native yes
USA extant native yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Russia (Asian) Meinypylginski and Kapylgyn lakes
Russia (Asian) Vankarem lowlands and Kolyuchin bay
Russia (Asian) Meechkyn spit and adjacent plain
Russia (Asian) Lower Anadyr lowlands
Russia (Asian) Commander Islands
USA Chagvan Bay
USA Nanvak Bay
USA Nushagak Bay
USA Kvichak Bay
USA Egegik Bay
USA Ugashik Bay
USA Kuluk Bay
USA Central Yukon - Kuskokwim
USA Kuskokwim River Delta
USA Carter Bay
USA Goodnews Bay
USA Nushagak Bay, marine
USA Cinder River-Hook Lagoon
USA Port Heiden
USA Seal Islands
USA Port Moller-Herendeen Bay
USA Nelson Lagoon-Mud Bay
USA Izembek-Moffet-Kinzarof Lagoons
USA Bechevin Bay
USA Chiniak Bay
USA Chignik Bay
USA Wide Bay
USA Ivanof Bay
Russia (Asian) Mechigmenskiy Gulf

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Grassland Tundra major breeding
Marine Coastal/Supratidal Coastal Brackish/Saline Lagoons/Marine Lakes suitable passage
Marine Intertidal Rocky Shoreline major non-breeding
Marine Intertidal Tidepools major non-breeding
Marine Neritic Estuaries suitable non-breeding
Wetlands (inland) Permanent Freshwater Lakes (over 8ha) major breeding
Altitude   Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Biological resource use Hunting & trapping terrestrial animals - Intentional use (species is the target) Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Species mortality
Climate change & severe weather Habitat shifting & alteration Timing Scope Severity Impact
Future Majority (50-90%) Slow, Significant Declines Low Impact: 5
Ecosystem degradation, Reduced reproductive success
Pollution Industrial & military effluents - Oil spills Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Species mortality

Recommended citation
BirdLife International (2023) Species factsheet: Anser canagicus. Downloaded from http://datazone.birdlife.org/species/factsheet/emperor-goose-anser-canagicus on 26/09/2023. Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from http://datazone.birdlife.org on 26/09/2023.