Animalia > Chordata > Aves > Anseriformes > Anatidae > Chen > Chen canagica

Chen canagica (Emperor Goose)

Synonyms: Anser canagicus; Philacte canagica

Wikipedia Abstract

The emperor goose (Chen canagica) is a species of goose. It breeds around the Bering Sea, mostly in Alaska, United States, but also in Kamchatka, Russia. It is migratory, wintering mainly in the Aleutian Islands. The species is listed as Near Threatened by the IUCN. The American Ornithologists' Union places this species and the North American "white" geese in the genus Chen, rather than the more traditional "gray" goose genus Anser. This species is much less gregarious than most geese, usually occurring in family groups. It breeds on coastal tundra, laying 3–7 eggs in a ground nest.
View Wikipedia Record: Chen canagica

EDGE Analysis

Uniqueness Scale: Similiar (0) 
 Unique (100)
Uniqueness & Vulnerability Scale: Similiar & Secure (0) 
 Unique & Vulnerable (100)
ED Score: 3.34417
EDGE Score: 2.16198


Adult Weight [1]  4.74 lbs (2.15 kg)
Birth Weight [3]  82 grams
Female Weight [1]  4.25 lbs (1.93 kg)
Male Weight [1]  5.22 lbs (2.37 kg)
Weight Dimorphism [1]  23.1 %
Female Maturity [3]  1 year
Male Maturity [3]  1 year
Breeding Habitat [2]  Arctic coastal
Wintering Geography [2]  Pacific Coast
Wintering Habitat [2]  Coastal marine, Rocky intertidal
Diet [4]  Carnivore (Invertebrates), Frugivore, Herbivore
Diet - Fruit [4]  20 %
Diet - Invertibrates [4]  10 %
Diet - Plants [4]  70 %
Forages - Ground [4]  80 %
Forages - Water Surface [4]  20 %
Clutch Size [3]  5
Clutches / Year [3]  1
Global Population (2017 est.) [2]  57,000
Incubation [3]  24 days
Maximum Longevity [3]  12 years
Migration [5]  Intercontinental
Wing Span [6]  3.9 feet (1.19 m)


Name Countries Ecozone Biome Species Report Climate Land
Alaska Peninsula montane taiga United States Nearctic Boreal Forests/Taiga
Aleutian Islands tundra United States Nearctic Tundra
Bering tundra Russia Palearctic Tundra
Beringia lowland tundra United States Nearctic Tundra
Beringia upland tundra United States Nearctic Tundra
Chukchi Peninsula tundra Russia Palearctic Tundra

Protected Areas

Name IUCN Category Area acres Location Species Website Climate Land Use
Alaska Maritime National Wildlife Refuge Ib 2347132 Alaska, United States
Aleutian Islands Biosphere Reserve 2720489 Alaska, United States    
California Coast Ranges Biosphere Reserve 153447 California, United States  
Elkhorn Slough Preserve Nature Conservancy - Preserve Ia 964 California, United States  
Farallon National Wildlife Refuge IV 352 California, United States
Gates of the Arctic National Park Ib 184461 Alaska, United States
Gwaii Haanas National Park Reserve II 366714 British Columbia, Canada
Kaloko-Honokohau National Historical Park   Hawaii, United States
Komandorsk Biosphere Reserve 9016082 Kamchatka Krai , Russia    
Koryak State Nature Reserve 808420 Kamchatka Krai, Russia
Kronotskiy Biosphere Reserve 361480 Russia  
Kronotsky Biosphere Reserve 2822275 Kamchatka Krai , Russia
Lava Beds National Monument III 20002 California, United States
Mount Arrowsmith Biosphere Reserve 293047 British Columbia, Canada  
Noatak Biosphere Reserve 7500143 Alaska, United States  
Point Reyes National Seashore II 27068 California, United States
Redwood National Park II 77867 California, United States
Wrangel Island State Nature Reserve 5499701 Chukotka, Russia    

Important Bird Areas

BirdLife Species Factsheet: View Factsheet
Name Location  IBA Criteria   Website   Climate   Land Use 
Bechevin Bay USA A1, A4i
Cape Peirce USA A1, A4i, A4ii
Carter Bay USA A1, A4i  
Central Yukon-Kuskokwim USA A1, A4i
Chagvan Bay USA A1, A4i
Chiniak Bay USA A1, A4i
Cinder River and Hook Lagoon USA A1, A4i  
Commander islands Russia (Asian) A1, A4i, A4ii, A4iii
Egegik Bay USA A1, A4i  
Goodnews Bay USA A1, A4i
Izembek and Moffet Lagoons USA A1, A4i  
Kuluk Bay USA A1, A4i  
Kuskokwim River Delta USA A1, A4i
Kvichak Bay USA A1, A4i
Lower Anadyr lowlands Russia (Asian) A1, A4i, A4iii
Meechkyn spit and adjacent plain Russia (Asian) A3, A4i
Meinypylginski and Kapylgyn lakes Russia (Asian) A3, A4i
Nanvak Bay USA A1, A4i
Nelson Lagoon-Mud Bay USA A1, A4i  
Nushagak Bay USA A1, A4i
Port Heiden USA A1, A4i
Port Moller-Herendeen Bay USA A1, A4i  
Seal Islands USA A1, A4i
Semichi Islands USA A1, A4i    
Ugashik Bay USA A1, A4i
Vankarem lowlands and Kolyuchin bay Russia (Asian) A1, A2, A3, A4i  

Prey / Diet

Carex ramenskii (Ramensk's sedge)[6]
Carex subspathacea (Hoppner's sedge)[6]
Limecola balthica (Baltic macoma)[6]
Mytilus edulis (Blue mussel)[6]
Puccinellia phryganodes (creeping alkaligrass)[6]
Stuckenia pectinata (sago pondweed)[7]
Triglochin palustris (Marsh Arrow Grass)[6]
Zostera marina (Eel Grass)[7]

Prey / Diet Overlap

Competing SpeciesCommon Prey Count
Branta bernicla (Brent Goose)3
Branta bernicla nigricans (Lawrence's brant goose)2
Bucephala islandica (Barrow's Goldeneye)1
Calidris canutus (Red Knot)2
Calidris maritima (Purple Sandpiper)1
Calidris minutilla (Least Sandpiper)1
Calidris pusilla (Semipalmated Sandpiper)1
Chroicocephalus ridibundus (Common Black-headed Gull)1
Clangula hyemalis (Oldsquaw)1
Cygnus cygnus (Whooper Swan)1
Cymatogaster aggregata (Shiner)1
Haematopus bachmani (Black Oystercatcher)1
Haematopus ostralegus (Eurasian Oystercatcher)1
Larus argentatus (Herring Gull)1
Larus canus (Mew Gull)1
Limnodromus griseus (Short-billed Dowitcher)1
Limosa lapponica (Bar-tailed Godwit)1
Limosa limosa (Black-tailed Godwit)1
Melanitta fusca deglandi (American white-winged scoter)1
Melanitta nigra (Black Scoter)2
Numenius arquata (Eurasian Curlew)1
Somateria mollissima (Common Eider)2


Aquila chrysaetos (Golden Eagle)[7]
Haliaeetus leucocephalus (Bald Eagle)[7]
Homo sapiens (man)[7]
Larus glaucescens (Glaucous-winged Gull)[7]
Larus hyperboreus (Glaucous Gull)[7]
Stercorarius parasiticus (Parasitic Jaeger)[7]


Parasitized by 
Hymenolepis nyrocae <Unverified Name>[8]
Hymenolepis philactes <Unverified Name>[8]

Range Map

Europe & Northern Asia (excluding China); North America; Oceania;



Attributes / relations provided by
1Petersen, MR, Schmutz, JA and Rockwell, RF. 1994. Emperor goose (Chen canagica). – In: Poole, A. and Gill, F. (eds), The birds of North America, no. 97. The Academy of Natural Sciences, Philadelphia. The American Ornithologists Union, Washington, DC
2Partners in Flight Avian Conservation Assessment Database, version 2017. Accessed on January 2018.
3de Magalhaes, J. P., and Costa, J. (2009) A database of vertebrate longevity records and their relation to other life-history traits. Journal of Evolutionary Biology 22(8):1770-1774
4Hamish Wilman, Jonathan Belmaker, Jennifer Simpson, Carolina de la Rosa, Marcelo M. Rivadeneira, and Walter Jetz. 2014. EltonTraits 1.0: Species-level foraging attributes of the world's birds and mammals. Ecology 95:2027
5Riede, Klaus (2004) Global Register of Migratory Species - from Global to Regional Scales. Final Report of the R&D-Projekt 808 05 081. 330 pages + CD-ROM
6del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona.
7Jorrit H. Poelen, James D. Simons and Chris J. Mungall. (2014). Global Biotic Interactions: An open infrastructure to share and analyze species-interaction datasets. Ecological Informatics.
8Gibson, D. I., Bray, R. A., & Harris, E. A. (Compilers) (2005). Host-Parasite Database of the Natural History Museum, London
Ecoregions provided by World Wide Fund For Nature (WWF). WildFinder: Online database of species distributions, ver. 01.06 WWF WildFINDER
Protected Areas provided by Biological Inventories of the World's Protected Areas in cooperation between the Information Center for the Environment at the University of California, Davis and numerous collaborators.
Specially protected natural territories of the Russian Federation, Ministry of Natural Resources and Environment of the Russian Federation
Images provided by Google Image Search
Abstract provided by DBpedia licensed under a Creative Commons License
Weather provided by NOAA METAR Data Access