Data Zone
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 |
|---|---|---|
| 2018 | Near Threatened | A4ace |
| 2016 | Near Threatened | A4a |
| 2014 | Near Threatened | A4a |
| 2013 | Critically Endangered | A4bcde |
| 2012 | Critically Endangered | A4bcde |
| 2010 | Critically Endangered | A4b,c,d,e |
| 2009 | Critically Endangered | A4b,c,d,e |
| 2008 | Critically Endangered | |
| 2005 | Critically Endangered | |
| 2004 | Critically Endangered | |
| 2000 | Lower Risk/Least Concern | |
| 1994 | Lower Risk/Least Concern | |
| 1988 | Lower Risk/Least Concern |
| Migratory status | not a migrant | Forest dependency | High |
| Land mass type |
Land-mass type - shelf island Land-mass type - continent |
Average mass | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence breeding/resident (km2) | 5,940,000 | medium |
| Extent of Occurrence non-breeding (km2) | 6,840,000 | medium |
| Number of locations | - | |
| Severely Fragmented | - |
| Value | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| No. of mature individuals | 32000-55000 | medium | estimated | 2014 |
| Population trend | Decreasing | good | 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) | 25-29 | - | - | - |
| Number of subpopulations | - | - | - | |
| Percentage in largest subpopulation | 100 | - | - | - |
| Generation length (yrs) | 12.1 | - | - | - |
Population justification: The total population was recently estimated at 30,900-56,800 individuals (U.S. Fish and Wildlife Service 2010), but when factoring in the potential proportion of birds not counted in surveys, the total population may number c.48,000-82,000 individuals (M. Kirchhoff in litt. 2014). This is assumed to equate to c.32,000-55,000 mature individuals.
Trend justification: Surveys had suggested that the population was undergoing an extremely rapid decline, which was projected to continue (K. Kuletz in litt. 2002; Kuletz et al. 2003; Kissling 2006; Piatt et al. undated). However, more recent surveys and analyses suggest that the population may not be declining at such a steep rate (M. Kissling in litt. 2010; M. Kirchhoff in litt. 2010), with numbers in some areas appearing to be stable (Kirchhoff et al. 2014, M. Kirchhoff in litt. 2014). Following this recent information the population is suspected to be in moderately rapid decline.
| Country/Territory | Occurrence status | Presence | Resident | Breeding | Non-breeding | Passage |
|---|---|---|---|---|---|---|
| Canada | N | Extant | Yes | |||
| Japan | N | Extant | Yes | |||
| Russia | N | Extant | Yes | |||
| Russia (Asian) | N | Extant | Yes | |||
| USA | N | Extant | Yes |
| Country/Territory | IBA Name |
|---|---|
| USA | Agattu Island |
| USA | Attu Island |
| USA | Cape Lisburne and Thompson, marine |
| USA | Kachemak Bay (South Shore) |
| USA | Harriman Fjord |
| USA | Uganik Bay & Viekoda Bay |
| USA | Icy Bay |
| USA | Glacier Bay & Icy Strait |
| USA | Glacier Bay Outer Coast Marine |
| USA | Kachemak Bay |
| USA | Kenai Fjords |
| USA | Prince William Sound |
| USA | Unimak & Akutan Passes |
| USA | Yakutat Bay |
| Russia (Asian) | Odyan bay |
| Russia (Asian) | Senyavina Strait |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Forest | Boreal | major | breeding |
| Marine Neritic | Macroalgal/Kelp | major | resident |
| Marine Neritic | Pelagic | suitable | 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 | non-breeding |
| Marine Oceanic | Mesopelagic (200-1000m) | suitable | non-breeding |
| Rocky areas (eg. inland cliffs, mountain peaks) | major | breeding | |
| Altitude | Occasional altitudinal limits |
| Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Biological resource use | Fishing & harvesting aquatic resources - Unintentional effects: (large scale) [harvest] | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Slow, Significant Declines | Medium Impact: 6 | ||||||
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| Climate change & severe weather | Habitat shifting & alteration | Timing | Scope | Severity | Impact | ||||
| Ongoing | Whole (>90%) | Unknown | Unknown | ||||||
|
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| Human intrusions & disturbance | Recreational activities | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
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| 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 | ||||||
|
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| Pollution | Industrial & military effluents - Oil spills | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Slow, Significant Declines | Medium Impact: 6 | ||||||
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Recommended citation
BirdLife International (2023) Species factsheet: Brachyramphus brevirostris. Downloaded from
http://www.birdlife.org on 24/03/2023.
Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 24/03/2023.
