Data Zone
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.
| Critically Endangered | Endangered | Vulnerable |
|---|---|---|
| - | - | - |
| Year | Category | Criteria |
|---|---|---|
| 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 | 211 g |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence (breeding/resident) | 15,300,000 km2 | medium |
| Extent of Occurrence (non-breeding) | 26,400,000 km2 | medium |
| Severely fragmented? | no | - |
| Estimate | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| Population size | unknown | poor | estimated | 2009 |
| Population trend | decreasing | - | estimated | - |
| Generation length | 7.3 years | - | - | - |
Population justification: The global population is estimated to number c.1,000,000-2,000,000 individuals (del Hoyo et al. 1996). National population estimates include: c.100-10,000 breeding pairs and c.1,000-10,000 wintering individuals in China; c.100-10,000 breeding pairs and c.1,000-10,000 wintering individuals in Korea; c.100-10,000 breeding pairs and c.1,000-10,000 wintering individuals in Japan and c.10,000-100,000 breeding pairs and c.1,000-10,000 wintering individuals in Russia (Brazil 2009).
Trend justification: In North America, the population trend is decreasing (based on BBS/CBC data: Butcher and Niven 2007). The global population is also suspected to be in decline owing to predation by invasive species.
| Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
|---|---|---|---|---|---|---|
| Canada | extant | native | yes | |||
| China (mainland) | extant | native | yes | |||
| Hong Kong (China) | extant | native | yes | |||
| Japan | extant | native | yes | |||
| Mexico | extant | native | yes | |||
| North Korea | extant | native | yes | |||
| Russia | extant | native | yes | |||
| Russia (Asian) | extant | native | yes | |||
| South Korea | extant | native | yes | |||
| Taiwan, China | extant | native | yes | |||
| United Kingdom | extant | vagrant | yes | |||
| USA | extant | native | yes |
| Country/Territory | IBA Name |
|---|---|
| Canada | Alder Island |
| Canada | Dodge Point and Gogit Passage Island Chain |
| Canada | Englefield Bay Islands |
| Canada | Frederick Island |
| Canada | Hippa Island |
| Canada | Kunghit Island and Luxana Bay |
| Canada | Langara Island |
| Canada | Laskeek Bay |
| Canada | Ramsay and Northern Juan Perez Sound Islands |
| Canada | Rankine and Langtry Islands |
| Canada | Skincuttle Inlet Islands |
| Russia (Asian) | Avachinskaya Bay and Starichkov Island |
| Russia (Asian) | Chikhacheva Gulf |
| Russia (Asian) | Kuril islands (between Urup and Paramushir) |
| Russia (Asian) | Talan Island |
| Russia (Asian) | Tyuleniy Island |
| South Korea | Chilbal-do island |
| South Korea | Kukul-do island |
| USA | Buldir & Near Islands Marine |
| USA | Buldir Island Colony |
| USA | Castle Rock Colonies |
| USA | Cherni Island Complex Colonies |
| USA | Dixon Entrance 132W54N |
| USA | Fenimore Pass & Atka Island Marine |
| USA | Koniuji-Atka Island Colony |
| USA | Shumagin Islands Marine |
| USA | Unimak & Akutan Passes |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Marine Coastal/Supratidal | Sea Cliffs and Rocky Offshore Islands | major | breeding |
| Marine Intertidal | Rocky Shoreline | major | resident |
| Marine Intertidal | Tidepools | major | resident |
| 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 | 0 - 100 m | Occasional altitudinal limits |
| Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Climate change & severe weather | Temperature extremes | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Causing/Could cause fluctuations | Medium Impact: 6 | ||||||
|
|||||||||
| Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Named species | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Rapid Declines | Medium Impact: 6 | ||||||
|
|||||||||
| Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Procyon lotor | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Rapid Declines | Medium Impact: 6 | ||||||
|
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Recommended citation
BirdLife International (2024) Species factsheet: Ancient Murrelet Synthliboramphus antiquus. Downloaded from
https://datazone.birdlife.org/species/factsheet/ancient-murrelet-synthliboramphus-antiquus on 22/11/2024.
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 22/11/2024.