Cepphus columba


Taxonomy [top]

Kingdom Phylum Class Order Family

Scientific Name: Cepphus columba
Species Authority: Pallas, 1811
Common Name(s):
English Pigeon Guillemot

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2012
Date Assessed: 2012-05-01
Assessor(s): BirdLife International
Reviewer(s): Butchart, S. & Symes, A.
Facilitator/Compiler(s): Ekstrom, J., Butchart, S., Calvert, R.
This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). The population trend appears to be stable, and hence the species does not approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size is very large, and hence does not approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.

Geographic Range [top]

Range Description: The Pigeon Guillemot can be found in the North Pacific, breeding from the Kuril Islands (Russia), on the Kamchatkan Peninsula to the eastern tip of Siberia, Russia, and from the western tip of Alaska (USA) down through the Atlantic coast of Canada to southern California (USA), including colonies on the Commander and Aleutian Islands (del Hoyo et al. 1996).
Canada; Japan; Mexico; Russian Federation; United States
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: The global population is estimated to number >  c.470,000 individuals (del Hoyo et al. 1996), while the population in Russia has been estimated at c.100-10,000 breeding pairs, c.50-1,000 individuals on migration and c.50-1,000 wintering individuals (Brazil 2009).
Population Trend: Stable

Habitat and Ecology [top]

Habitat and Ecology: This marine species can be found along rocky coastlines of the North Pacific. Its diet includes a wide variety of small benthic fish and invertebrates, widening to include more species in the summer. Chicks are usually fed fish which tend to be obtained within 1 km of the colony. It normally arrives at colonies between March and April, breeding on sea cliffs and slopes close to regions of shallow water usually less than 50 m deep. It is a monogamous species with high mate and site fidelity, usually breeding in small colonies of under 50 birds, sometimes as single pairs, but colonies of over 1000 birds have been seen. Individuals normally remain near colonies outside the breeding season, though birds from Alaska and California move south and north respectively (del Hoyo et al. 1996).
Systems: Terrestrial; Marine

Citation: BirdLife International 2012. Cepphus columba. The IUCN Red List of Threatened Species. Version 2015.2. <>. Downloaded on 31 August 2015.
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