The fifth review of Birds of Conservation Concern in the United Kingdom, Channel Islands and Isle of Man and second IUCN Red List assessment of extinction risk of birds for Great Britain

The fifth review of Birds of Conservation Concern (BoCC5) in the UK, Channel Islands and Isle of Man assessed and assigned 245 species to updated Red, Amber and Green lists of conservation concern and showed a continuing decline in the status of our bird populations. In total, 70 species (29% of those assessed) are now on the Red list, up from 36 species in the first review in 1996. Since the last review, in 2015, Golden Oriole Oriolus oriolus has been lost as a breeding species. Eleven species have been moved to the Red list, while only six species moved from Red to Amber. Newly Red-listed species include Common Swift Apus apus, Common House Martin Delichon urbicum, Greenfinch Chloris chloris and the globally threatened Leach’s Storm-petrel Hydrobates leucorhous. There has been no improvement in the overall status of species associated with farmland and upland, or Afro-Palearctic migrants; indeed, more such species have been Red-listed. Concerns over the status of our wintering wildfow..., The dataset was created as part of the 5th Birds of Conservation Concern in the UK, Channel Islands and Isle of Man and 2nd IUCN Red List assessment of extinction-risk of birds in Great Britain. It uses data from a wide variety of sources, all outlined within the dataset, to present detailed result tables and methodologies not contained within the published article.
 , , # Data from: The fifth review of Birds of Conservation Concern in the United Kingdom, Channel Islands and Isle of Man and second IUCN Red List assessment of extinction risk of birds for Great Britain

[https://doi.org/10.5061/dryad.cc2fqz672](https://doi.org/10.5061/dryad.cc2fqz672)

Supplementary online material for the 5th Birds of Conservation Concern in the UK, Channel Islands and Isle of Man (BoCC5) and 2nd IUCN Red List assessment of extinction-risk of birds in Great Britain (GB_IUCN2)

Andrew Stanbury*, Mark Eaton, Nicholas Aebischer, Dawn Balmer, Andy Brown, Andy Douse, Patrick Lindley, Neil McCulloch, David Noble and Ilka Win

*corresponding author- Andrew Stanbury, RSPB Centre for Conservation Science, The Lodge, Sandy, Bedfordshire, United Kingdom, SG19 2DL; email:[[e-mail]](mailto:[e-mail])

BACKGROUND

Birds of Conservation Concern (BoCC)is a well-established, well-respected process for identifying conservation priorities for UK birds, ...