This is the 5th Birds of Conservation Concern review, with the first published in 1996.

The bird species that breed or overwinter here have been assessed against a set of objective criteria and placed on the Green, Amber or Red lists to indicate an increasing level of conservation concern. Data delays prevented an assessment of breeding seabirds (apart from Leach’s storm-petrel), so their status was carried over from Birds of Conservation Concern 4.

The quantitative criteria assessed the historical decline, recent trends in population and range, population size, localisation and international importance of each species, as well as its global and European threat status.

The assessments show that the status of UK bird populations continues to decline. Since the last review in 2015, the golden oriole has been lost as a breeding species. In addition, the length of the Red list has grown by three; 11 species have been added, but six have moved to Amber and two are now no longer assessed as they have either ceased breeding in the UK, or were excluded from the process for other reasons. The length of the Amber list has also grown by seven species.

Read the summary document here.