• Summary
• Text account
• Data table and detailed info
• Distribution map
• Reference and further resources

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.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

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)	10,900,000 km2
Extent of Occurrence (non-breeding)	17,900,000 km2
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	800000 mature individuals	poor	estimated	1996
Population trend	decreasing	-	suspected	-
Generation length	10.7 years	-	-	-

Population justification: The global population is estimated to number more than 1,200,000 individuals, which equates to more than 800,000 mature individuals (del Hoyo et al. 1996)

Trend justification: The population is suspected to be in decline owing to predation by invasive species and ongoing habitat destruction.

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Canada	extant	native	yes		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)	Kuril islands (between Urup and Paramushir)
Russia (Asian)	Ratmanova Island
Russia (Asian)	Shantarskiye Islands
Russia (Asian)	Talan Island
Russia (Asian)	Yamskiye Islands
USA	Amagat & Umga Island Colonies
USA	Buldir & Near Islands Marine
USA	Buldir Island Colony
USA	Castle Rock Colonies
USA	Chamisso Island Colonies
USA	Cherni Island Complex Colonies
USA	Chirikof Island Marine
USA	Fenimore Pass & Atka Island Marine
USA	Koniuji-Shumagin Islands Colonies
USA	Morzhovoi Bay
USA	Near Island Colony
USA	Seal Cape Marine
USA	Segula & Davidof Islands Colonies
USA	Semidi Islands Colonies
USA	Semidi Islands Marine
USA	Shumagin Islands Marine
USA	St George Island Colony
USA	St George Island Marine
USA	Ugaiushak Island Colonies

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Marine Coastal/Supratidal	Sea Cliffs and Rocky Offshore Islands	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	resident
Marine Oceanic	Mesopelagic (200-1000m)	suitable	resident
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: (subsistence/small scale) [harvest]	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Ecosystem degradation, Reduced reproductive success, Species mortality
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Named species	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Reduced reproductive success
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Vulpes lagopus	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Reduced reproductive success, Species mortality
Invasive and other problematic species, genes & diseases	Invasive non-native/alien species/diseases - Vulpes vulpes	Timing		Scope		Severity		Impact
		Ongoing		Minority (<50%)		Negligible declines		Low Impact: 4
		Stresses Species mortality

Purpose	Scale
Pets/display animals, horticulture	international

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Recommended citation
BirdLife International (2024) Species factsheet: Horned Puffin Fratercula corniculata. Downloaded from https://datazone.birdlife.org/species/factsheet/horned-puffin-fratercula-corniculata 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.