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. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
Critically Endangered | Endangered | Vulnerable |
---|---|---|
- | - | - |
Year | Category | Criteria |
---|---|---|
2020 | Least Concern | |
2018 | 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 |
Migratory status | not a migrant | Forest dependency | does not normally occur in forest |
Land-mass type | Average mass | - |
Estimate | Data quality | |
---|---|---|
Extent of Occurrence (breeding/resident) | 4,510,000 km2 | |
Extent of Occurrence (non-breeding) | 5,950,000 km2 | |
Severely fragmented? | no | - |
Estimate | Data quality | Derivation | Year of estimate | |
---|---|---|---|---|
Population size | 20000000 mature individuals | poor | estimated | 2013 |
Population trend | decreasing | - | suspected | - |
Generation length | 7.2 years | - | - | - |
Population justification: The global population is estimated to number 20 million mature individuals (Partners in Flight 2019).
Trend justification: The population is suspected to be in decline due to predation by invasive species and loss of access to prey resources due to climate change-driven trophic shifts.
Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
---|---|---|---|---|---|---|
Canada | extant | vagrant | yes | |||
Japan | extant | native | yes | |||
Russia | extant | native | yes | yes | yes | |
Russia (Asian) | extant | native | yes | yes | yes | |
USA | extant | native | yes | yes | yes |
Country/Territory | IBA Name |
---|---|
Russia (Asian) | Iony Island |
Russia (Asian) | Ratmanova Island |
Russia (Asian) | Yamskiye Islands |
USA | Diomede Islands Colonies |
USA | Gareloi Island Colony |
USA | Gareloi Island Marine |
USA | Kiska Island Colonies |
USA | Kiska Island Marine |
USA | Northwest Cape Colony |
USA | Savoonga Colonies |
USA | Segula & Davidof Islands Colonies |
USA | Southwest Cape Colonies |
USA | St George Island Colony |
USA | St Matthew & Hall Islands Colonies |
Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
---|---|---|---|
Marine Coastal/Supratidal | Sea Cliffs and Rocky Offshore Islands | major | breeding |
Marine Intertidal | Rocky Shoreline | major | breeding |
Marine Intertidal | Tidepools | major | breeding |
Marine Neritic | Macroalgal/Kelp | major | resident |
Marine Neritic | Pelagic | major | resident |
Marine Neritic | Seagrass (Submerged) | major | resident |
Marine Neritic | Subtidal Loose Rock/pebble/gravel | major | resident |
Marine Neritic | Subtidal Rock and Rocky Reefs | major | resident |
Marine Neritic | Subtidal Sandy | major | resident |
Marine Neritic | Subtidal Sandy-Mud | major | resident |
Marine Oceanic | Epipelagic (0-200m) | suitable | resident |
Marine Oceanic | Mesopelagic (200-1000m) | suitable | resident |
Altitude | Occasional altitudinal limits |
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 | ||||||
|
|||||||||
Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Rattus norvegicus | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
|||||||||
Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Vulpes vulpes | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
Purpose | Scale |
---|---|
Food - human | subsistence, national |
Pets/display animals, horticulture | international |
Recommended citation
BirdLife International (2024) Species factsheet: Least Auklet Aethia pusilla. Downloaded from
https://datazone.birdlife.org/species/factsheet/least-auklet-aethia-pusilla on 23/12/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from
https://datazone.birdlife.org/species/search on 23/12/2024.