Key findings

This section summarises the key findings of the report, under six headings, based on the results presented and discussed in the Summary tables and Discussion sections. It concentrates on the alerts raised by this edition of the report and changes to alerts since previous reports in this series.

Amber and red listings for breeding trends use similar criteria to the BirdTrends alerts and were reviewed in 2021. This report, using one additional year's data not available to BoCC5, suggest potential updates to current conservation concern for Common Sandpiper (from amber to red) and for SwallowGarden Warbler and Chaffinch (from green to amber). However, it should be noted that Garden Warbler has shown frequent fluctuations in trends over the long-term.

This report does not suggest potential downgrading of the alert status as a result of improved trends since the 2021 review. 


This report should be cited as: Massimino, D., Woodward, I.D., Hammond, M.J., Barber, L., Barimore, C., Harris, S.J., Leech, D.I., Noble, D.G., Walker, R.H., Baillie, S.R. & Robinson, R.A. (2020) BirdTrends 2020: trends in numbers, breeding success and survival for UK breeding birds. BTO Research Report 732. BTO, Thetford.