LC
Ross's Goose Anser rossii



Taxonomy

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

Taxonomic source(s)
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#.
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. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.

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

Red List history
Year Category Criteria
2021 Least Concern
2016 Least Concern
2012 Least Concern
2009 Least Concern
2008 Least Concern
2004 Least Concern
2000 Lower Risk/Least Concern
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 Average mass -
Distribution

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 3,960,000 medium
Extent of Occurrence non-breeding (km2) 2,850,000 medium
Number of locations -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals 2100000 poor estimated 2020
Population trend Increasing estimated -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) - - -
Decline (10 years/3 generation past and future) - - -
Number of subpopulations - - -
Percentage in largest subpopulation - - -
Generation length (yrs) 6.9 - - -

Population justification: The global population is estimated to number 2,100,000 mature individuals (Partners in Flight 2020).

Trend justification: The species is undergoing a large increase, at an average rate of 12% per year (Partners in Flight 2020; see also Wetlands International 2020).


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Bahamas V Extant
Canada N Extant Yes Yes
Mexico N Extant Yes
Netherlands V Extant
Russia V Extant
Russia (Asian) V Extant
USA N Extant Yes Yes Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Canada Churchill and Vicinity
Canada Queen Maud Gulf
Canada McConnell River
Canada Jenny Lind Island
Canada St. Mary's River Complex (Echo Bay ON to Maxton Bay MI)
Canada Luck Lake
Canada Cabri Area
Canada Barber Lake
Mexico Laguna de Mexicanos
Mexico Complejo de Humedales del Noroeste de Chihuahua
Mexico Laguna de Bustillos

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Aquatic & Marine Artificial/Aquatic - Water Storage Areas (over 8ha) suitable non-breeding
Artificial/Terrestrial Arable Land major non-breeding
Artificial/Terrestrial Pastureland major non-breeding
Grassland Tundra major breeding
Rocky areas (eg. inland cliffs, mountain peaks) suitable breeding
Wetlands (inland) Permanent Freshwater Lakes (over 8ha) suitable non-breeding
Altitude 0 - 2500 m Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Climate change & severe weather Habitat shifting & alteration Timing Scope Severity Impact
Future Whole (>90%) Unknown Unknown
Stresses
Indirect ecosystem effects, Ecosystem degradation

Utilisation
Purpose Primary form used Life stage used Source Scale Level Timing
Pets/display animals, horticulture - - International Non-trivial Recent
Sport hunting/specimen collecting - - Non-trivial Recent

Recommended citation
BirdLife International (2022) Species factsheet: Anser rossii. Downloaded from http://www.birdlife.org on 16/05/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 16/05/2022.