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LC
Black Guillemot Cepphus grylle

IUCN Red List history

Year Category
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 378 g

Distribution

  Estimate Data quality
Extent of Occurrence breeding/resident (km2) 2,120,000 medium
Extent of Occurrence non-breeding (km2) 5,870,000 medium
Number of locations -
Fragmentation -

Population & trend

  Estimate Data quality Derivation Year of estimate
No. of mature individuals poor Estimated 2009
Population trend Increasing -
Number of subpopulations - - -
Largest subpopulation - - -
Generation length (yrs) 10.9 - - -
Population justification: The global population is estimated to number c.400,000-700,000 individuals (del Hoyo et al. 1996), while the population in Russia has been estimated at < c.100 breeding pairs and < c.50 individuals on migration (Brazil 2009).
Trend justification: The population trend is increasing in North America (based on BBS/CBC data: Butcher and Niven 2007).

Country/Territory distribution

Country/Territory Occurrence status Presence Breeding Non-breeding Passage Resident
Belgium Vagrant Extant   Yes    
Canada Native Extant Yes      
Croatia Vagrant Extant        
Czech Republic Vagrant Extant        
Denmark Native Extant     Yes Yes
Estonia Native Extant       Yes
Faroe Islands (to Denmark) Native Extant       Yes
Finland Native Extant     Yes Yes
France Vagrant Extant   Yes    
Germany Native Extant   Yes    
Greenland (to Denmark) Native Extant       Yes
Iceland Native Extant       Yes
Ireland Native Extant       Yes
Latvia Native Extant   Yes    
Netherlands Vagrant Extant        
Norway Native Extant       Yes
Poland Native Extant   Yes Yes  
Russia (Asian) Native Extant Yes      
Russia (Central Asian) Vagrant Extant        
Russia (European) Native Extant Yes      
Slovenia Vagrant Extant   Yes    
Spain Vagrant Extant   Yes    
St Pierre and Miquelon (to France) Native Extant       Yes
Svalbard and Jan Mayen Islands (to Norway) Native Extant Yes   Yes  
Sweden Native Extant       Yes
United Kingdom Native Extant       Yes
USA Native Extant Yes      

Important Bird Areas where this species has triggered the IBA criteria

Country/Territory IBA Name IBA link
Canada Brandypot Islands site factsheet
Canada Digges Sound site factsheet
Canada Île aux Basques et Les Razades site factsheet
Canada Île Blanche site factsheet
Canada La Malbaie–Pointe-au-Pic site factsheet
Canada North Kent Island site factsheet
Canada Northeast James Bay Coast site factsheet
Canada Péninsule de Forillon site factsheet
Canada Prince Leopold Island site factsheet
Canada Skruis Point site factsheet
Denmark Hirsholmene site factsheet
Denmark Hyllekrog-Rødsand and Fehmarn Belt site factsheet
Denmark Ronne Banke site factsheet
Denmark Rønne Banke site factsheet
Estonia Irbe strait site factsheet
Faroe Islands (to Denmark) Bordoy site factsheet
Faroe Islands (to Denmark) Eysturoy site factsheet
Faroe Islands (to Denmark) Fugloy site factsheet
Faroe Islands (to Denmark) Hestur site factsheet
Faroe Islands (to Denmark) Kalsoy site factsheet
Faroe Islands (to Denmark) Koltur site factsheet
Faroe Islands (to Denmark) Kunoy site factsheet
Faroe Islands (to Denmark) Mykines and Mykineshólmur site factsheet
Faroe Islands (to Denmark) Nólsoy site factsheet
Faroe Islands (to Denmark) Sandoy site factsheet
Faroe Islands (to Denmark) Skúvoy site factsheet
Faroe Islands (to Denmark) Stóra Dímun site factsheet
Faroe Islands (to Denmark) Streymoy site factsheet
Faroe Islands (to Denmark) Suduroy site factsheet
Faroe Islands (to Denmark) Svínoy site factsheet
Faroe Islands (to Denmark) Vágar site factsheet
Faroe Islands (to Denmark) Vidoy site factsheet
Finland Eckerö and Hammarland archipelago site factsheet
Finland Itäinen Suomenlahti National Park site factsheet
Finland Korppoo and Nauvo southern archipelago site factsheet
Finland Merenkurkku archipelago site factsheet
Finland Mulklobb site factsheet
Finland Pernaja outer archipelago site factsheet
Finland Porvoo outer archipelago site factsheet
Finland Rahja archipelago site factsheet
Finland Tammisaari and Inkoo western archipelago site factsheet
Greenland (to Denmark) Islands and waters south and west of Upernavik town site factsheet
Iceland Ædey site factsheet
Iceland Breidafjördur site factsheet
Ireland Blasket Islands site factsheet
Ireland Clare Island cliffs site factsheet
Ireland Duvillaun Islands site factsheet
Ireland Howth Head site factsheet
Ireland Inishtrahull site factsheet
Ireland Rockabill site factsheet
Latvia Irbe strait site factsheet
Norway Froan site factsheet
Norway Loppa site factsheet
Norway Lovunden site factsheet
Norway Røst site factsheet
Norway Sklinna site factsheet
Norway Smøla archipelago site factsheet
Norway Sør-Fugløy site factsheet
Norway Vega archipelago site factsheet
Poland Central Polish coastal waters site factsheet
Poland Pomeranian bay site factsheet
Poland Slupsk bank site factsheet
Russia (Asian) Kuril islands (between Urup and Paramushir) site factsheet
Russia (European) Bezymyannaya and Gribovaya Bays and adjoining waters site factsheet
Russia (European) Kandalaksha Bay site factsheet
Russia (European) Onega Bay of the White Sea site factsheet
Svalbard and Jan Mayen Islands (to Norway) Bjørnøya (Bear Island) site factsheet
Svalbard and Jan Mayen Islands (to Norway) Forlandet National Park site factsheet
Svalbard and Jan Mayen Islands (to Norway) Hopen island site factsheet
Svalbard and Jan Mayen Islands (to Norway) Jan Mayen island site factsheet
Svalbard and Jan Mayen Islands (to Norway) North-west Spitsbergen National Park site factsheet
Sweden Björn archipelago site factsheet
Sweden Bonden island site factsheet
Sweden Bråviken - Hävringe site factsheet
Sweden Hoburgs Bank site factsheet
Sweden Holmöarna archipelago site factsheet
Sweden Northern Midsjö Bank site factsheet
Sweden Outer Stockholm archipelago site factsheet
Sweden Rödkallen-SörÄspen site factsheet
Sweden Southern Midsjö Bank site factsheet
Sweden The Archipelago of Nothern Hälsingland site factsheet
Sweden Väderöarna site factsheet
United Kingdom Caithness Cliffs site factsheet
United Kingdom Faray and Holm of Faray site factsheet
United Kingdom Gigha Island and Islets site factsheet
United Kingdom Monach Islands site factsheet
United Kingdom North Ronaldsay Coast site factsheet
United Kingdom North Westray Coast site factsheet
United Kingdom Papa Westray (North Hill and Holm) site factsheet
United Kingdom Scapa Flow site factsheet
United Kingdom South-eastern Stronsay site factsheet

Habitats & altitude

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 breeding
Marine Neritic Macroalgal/Kelp major non-breeding
Marine Neritic Pelagic marginal resident
Marine Neritic Seagrass (Submerged) major breeding
Marine Neritic Seagrass (Submerged) major non-breeding
Marine Neritic Subtidal Loose Rock/pebble/gravel major breeding
Marine Neritic Subtidal Loose Rock/pebble/gravel major non-breeding
Marine Neritic Subtidal Rock and Rocky Reefs major breeding
Marine Neritic Subtidal Rock and Rocky Reefs major non-breeding
Marine Neritic Subtidal Sandy major breeding
Marine Neritic Subtidal Sandy major non-breeding
Marine Neritic Subtidal Sandy-Mud major breeding
Marine Neritic Subtidal Sandy-Mud major non-breeding
Marine Oceanic Epipelagic (0-200m) suitable non-breeding
Marine Oceanic Mesopelagic (200-1000m) suitable non-breeding
Altitude 0 - 100 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 Whole Adults and juveniles Wild International Non-trivial Recent

Recommended citation
BirdLife International (2014) Species factsheet: Cepphus grylle. Downloaded from http://www.birdlife.org on 21/10/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 21/10/2014.

This information is based upon, and updates, the information published in BirdLife International (2000) Threatened birds of the world. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife International, BirdLife International (2004) Threatened birds of the world 2004 CD-ROM and BirdLife International (2008) Threatened birds of the world 2008 CD-ROM. These sources provide the information for species accounts for the birds on the IUCN Red List.

To provide new information to update this factsheet or to correct any errors, please email BirdLife

To contribute to discussions on the evaluation of the IUCN Red List status of Globally Threatened Birds, please visit BirdLife's Globally Threatened Bird Forums.

Key facts
Current IUCN Red List category Least Concern
Family Alcidae (Auks)
Species name author (Linnaeus, 1758)
Population size mature individuals
Population trend Increasing
Distribution size (breeding/resident) 2,120,000 km2
Country endemic? No
Links to further information
- Summary information on this species