Common guillemot (Uria aalge)

Distribution data supplied by the Ocean Biodiversity Information System (OBIS). To interrogate UK data visit the NBN Atlas.Map Help

Summary

Description

The common guillemot is a rather dumpy, thick set auk reaching a maximum size of about 46 cm, and with a wingspan up to 73 cm. The breeding plumage has dark chocolate brown upperparts and head to the lower throat, and white underparts with some dark streaking on the flanks. Between different populations there is variation in the extent of this streaking. During the winter the sides of the face and throat are white. However, the extent of this colouration also varies between populations. The bill is long, slender and pointed, and the feet are black. A 'bridled' form occurs with a white eye ring and white stripes behind the eye. Juveniles resemble adults but display a variable amount of white on the throat.

Recorded distribution in Britain and Ireland

Breeding pairs are more commonly found in Scotland, but are found all around British and Irish coasts.

Global distribution

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Habitat

Uria aalge spends most of its life at sea, normally coming ashore only to nest for the May breeding season, but may return to colonies as early as September. Nests are made on bare, narrow ledges on steep cliffs, often in large numbers. Guillemots disperse widely during the winter but may be seen offshore around the UK.

Depth range

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Identifying features

  • Upperparts and head to lower throat of breeding plumage are a dark chocolate brown.
  • Underparts are white.
  • Sides of head and throat are white in winter.
  • Long, slender, pointed black bill.

Additional information

The diet consists mainly of fish but may include crustaceans. Please note that distribution maps are compiled using records for both breeding and wintering populations. For more specific distribution and abundance records please refer to maps compiled by The British Trust for Ornithology, available at http://www.bto.org/birdatlas/previous/index.htm

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Further information sources

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Bibliography

    Datasets

    1. Argyll Bird Club, 2017. Bird records for Argyll for the years 2002 and 2003. Occurrence dataset: https://doi.org/10.15468/uilybi accessed via GBIF.org on 2018-09-25.

    2. Bristol Regional Environmental Records Centre, 2017. BRERC species records recorded over 15 years ago. Occurrence dataset: https://doi.org/10.15468/h1ln5p accessed via GBIF.org on 2018-09-25.

    3. Bristol Regional Environmental Records Centre, 2017. BRERC species records within last 15 years. Occurrence dataset: https://doi.org/10.15468/vntgox accessed via GBIF.org on 2018-09-25.

    4. British Trust for Ornithology, 2018. Birds (BTO+Partners). Occurrence dataset https://www.bto.org/ accessed via NBNAtlas.org on 2018-09-25.

    5. British Trust for Ornithology, 2018. BTO First Atlas of Breeding Birds in Britain and Ireland: 1968-1972. Occurrence dataset: https://www.bto.org/ accessed via NBNAtlas.org on 2018-09-25.

    6. British Trust for Ornithology, 2018. BTO First Atlas of Wintering Birds in Britain and Ireland: 1981/82-1983/84. Occurrence dataset: https://www.bto.org/ accessed via NBNAtlas.org on 2018-09-25.

    7. British Trust for Ornithology, 2018. BTO First Atlas of Wintering Birds in Britain and Ireland: 1981/82-1983/84. Occurrence dataset: https://www.bto.org/ accessed via NBNAtlas.org on 2018-09-25.

    8. Cofnod – North Wales Environmental Information Service, 2018. Miscellaneous records held on the Cofnod database. Occurrence dataset: https://doi.org/10.15468/hcgqsi accessed via GBIF.org on 2018-09-25.

    9. Cumbria Biodiversity Data Centre, 2018. Tullie House Museum Natural History Collections. Occurrence dataset: https://doi.org/10.15468/epewfs accessed via GBIF.org on 2018-09-25.

    10. Environmental Records Information Centre North East, 2018. ERIC NE Combined dataset to 2017. Occurrence dataset: http://www.ericnortheast.org.ukl accessed via NBNAtlas.org on 2018-09-38

    11. Fife Nature Records Centre, 2018. Fife Nature Records Centre combined dataset. Occurrence dataset: https://doi.org/10.15468/ccc1ip accessed via GBIF.org on 2018-09-27.

    12. Fife Nature Records Centre, 2018. St Andrews BioBlitz 2014. Occurrence dataset: https://doi.org/10.15468/erweal accessed via GBIF.org on 2018-09-27.

    13. Fife Nature Records Centre, 2018. St Andrews BioBlitz 2015. Occurrence dataset: https://doi.org/10.15468/xtrbvy accessed via GBIF.org on 2018-09-27.

    14. Fife Nature Records Centre, 2018. St Andrews BioBlitz 2016. Occurrence dataset: https://doi.org/10.15468/146yiz accessed via GBIF.org on 2018-09-27.

    15. Isle of Wight Local Records Centre, 2017. Isle of Wight Notable Species. Occurrence dataset: https://doi.org/10.15468/sm4ety accessed via GBIF.org on 2018-09-27.

    16. Lancashire Environment Record Network, 2018. LERN Records. Occurrence dataset: https://doi.org/10.15468/esxc9a accessed via GBIF.org on 2018-10-01.

    17. Manx Biological Recording Partnership, 2018. Isle of Man historical wildlife records 1995 to 1999. Occurrence dataset: https://doi.org/10.15468/lo2tge accessed via GBIF.org on 2018-10-01.

    18. Manx Biological Recording Partnership, 2022. Isle of Man historical wildlife records 1990 to 1994. Occurrence dataset:https://doi.org/10.15468/aru16v accessed via GBIF.org on 2024-09-27.

    19. Merseyside BioBank., 2017. Merseyside BioBank (verified). Occurrence dataset: https://doi.org/10.15468/ar0p6s accessed via GBIF.org on 2018-10-01.

    20. National Trust, 2017. National Trust Species Records. Occurrence dataset: https://doi.org/10.15468/opc6g1 accessed via GBIF.org on 2018-10-01.

    21. NBN (National Biodiversity Network) Atlas. Available from: https://www.nbnatlas.org.

    22. Norfolk Biodiversity Information Service, 2017. NBIS Records to December 2016. Occurrence dataset: https://doi.org/10.15468/jca5lo accessed via GBIF.org on 2018-10-01.

    23. North East Scotland Biological Records Centre, 2018. North East Scotland Birds (1883-2010). Occurrence dataset: https://doi.org/10.15468/o1okcz accessed via GBIF.org on 2018-10-01

    24. OBIS (Ocean Biodiversity Information System),  2024. Global map of species distribution using gridded data. Available from: Ocean Biogeographic Information System. www.iobis.org. Accessed: 2024-11-25

    25. Record, 2017. RECORD Aves Data. Occurrence dataset: https://doi.org/10.15468/pudf3y accessed via GBIF.org on 2018-10-01.

    26. South East Wales Biodiversity Records Centre, 2018. SEWBReC Birds (South East Wales). Occurrence dataset: https://doi.org/10.15468/qfainq accessed via GBIF.org on 2018-10-02.

    27. South East Wales Biodiversity Records Centre, 2018. Dr Mary Gillham Archive Project. Occurance dataset: http://www.sewbrec.org.uk/ accessed via NBNAtlas.org on 2018-10-02

    28. Suffolk Biodiversity Information Service., 2017. Suffolk Biodiversity Information Service (SBIS) Dataset. Occurrence dataset: https://doi.org/10.15468/ab4vwo accessed via GBIF.org on 2018-10-02.

    29. The Wildlife Information Centre, 2017. Biological Recording in Scotland - Scotsman Wildlife Surveys. Occurrence dataset: https://doi.org/10.15468/t50yhv accessed via GBIF.org on 2018-10-02.

    30. The Wildlife Information Centre, 2017. LWIC - Local Patch Project. Occurrence dataset http://www.wildlifeinformation.co.uk/. Accessed via NBNAtlas.org/ on 2018-10-02.

    31. The Wildlife Information Centre, 2017. Natalie Harmsworth's Records (2010-2016). Occurrence dataset http://www.wildlifeinformation.co.uk/. Accessed via NBNAtlas.org/ on 2018-10-02.

    32. The Wildlife Information Centre, 2018. TWIC Biodiversity Field Trip Data (1995-present). Occurrence dataset: https://doi.org/10.15468/ljc0ke accessed via GBIF.org on 2018-10-02.

    33. West Wales Biodiversity Information Centre, 2017. WTSWW Data: All Taxa (West Wales). Occurrence dataset: https://doi.org/10.15468/gaakk2 accessed via GBIF.org on 2018-10-02.

    34. Yorkshire Wildlife Trust, 2018. Yorkshire Wildlife Trust - Non-sensitive records from all taxonomic groups. Occurrence dataset: https://doi.org/10.15468/2razk5 accessed via GBIF.org on 2018-10-02.

    Citation

    This review can be cited as:

    Sweet, N. A. 2008. Uria aalge Common guillemot. In Tyler-Walters H. and Hiscock K. Marine Life Information Network: Biology and Sensitivity Key Information Reviews, [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 25-11-2024]. Available from: https://marlin.ac.uk/species/detail/2220

    Last Updated: 23/09/2008