Global population and conservation status of the great black-backed gull larus marinus

Samuel Langlois Lopez*, Alexander L. Bond, Nina J. O'Hanlon, Jared M. Wilson, Andrew Vitz, Carolyn S. Mostello, Frederick Hamilton, Jean François Rail, Linda Welch, Ruth Boettcher, Sabina I. Wilhelm, Tycho Anker-Nilssen, Francis Daunt, Elizabeth Masden

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

The Great Black-backed Gull Larus marinus is a generalist species that inhabits temperate and arctic coasts of the north Atlantic Ocean. In recent years, there has been growing concern about population declines at local and regional scales; however, there has been no attempt to robustly assess Great Black-backed Gull population trends across its global range. We obtained the most recent population counts across the species' range and analysed population trends at a global, continental, and national scale over the most recent three-generation period (1985-2021) following IUCN Red List criteria. We found that, globally, the species has declined by 43%-48% over this period (1.2-1.3% per annum, respectively), from an estimated 291,000 breeding pairs to 152,000-165,000 breeding pairs under two different scenarios. North American populations declined more steeply than European ones (68% and 28%, respectively). We recommend that Great Black-backed Gull should be uplisted from 'Least Concern' to 'Vulnerable' on the IUCN Red List of Threatened Species under criterion A2 (an estimated reduction in population size >30% over three generations).

Original languageEnglish
Article numbere23
Number of pages11
JournalBird Conservation International
Volume33
Early online date5 Aug 2022
DOIs
Publication statusPublished - 5 Aug 2022

Keywords / Materials (for Non-textual outputs)

  • bird conservation
  • gull populations
  • Larus gulls
  • population assessment
  • population ecology

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