• Summary
• Text account
• Data table and detailed info
• Distribution map
• Reference and further resources

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.

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

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	-

	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	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

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

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

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
		Stresses Species mortality
Climate change & severe weather	Habitat shifting & alteration	Timing		Scope		Severity		Impact
		Future		Majority (50-90%)		Slow, Significant Declines		Low Impact: 5
		Stresses Ecosystem degradation, Reduced reproductive success
Pollution	Industrial & military effluents - Oil spills	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Slow, Significant Declines		Low Impact: 5
		Stresses Species mortality

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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.