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European Seabirds at Sea

The European Seabirds at Sea (ESAS) database is a collaborative partnership between the Joint Nature Conservation Committee (JNCC) and seabird researchers in north-west Europe. Approximately 3 million counts of seabirds have been collected from at-sea surveys from ships and aircraft since 1979 following standardised methods. The resulting database is managed by the JNCC on behalf of the ESAS Co-ordinating Group and is not publically accessible; to request data please contact the JNCC Data Manager via the attached link:


  • Geographic location - UK and NW European waters
  • Species - All species

Description of research

The European Seabirds at Sea (ESAS) database contains at sea data collected from ships and aircraft using methods described in Tasker et al. 1984, updated in Webb & Durinck 1992 (in Komdeur et al. 1992) and Camphuysen 2004. Method consists of strip transect method with distance bands used for birds on the sea and snapshot information for flying birds. Data is collected by seabird researchers across north-west Europe and the Joint Nature Conservation Committee (JNCC) and is managed on behalf of partners by the JNCC.

Data type

  • At Sea Data


Mark Lewis
Joint Nature Conservation Committee
Aberdeen, United Kingdom
Inverdee House, Baxter Street
AB11 9QA