Population trend graphs
Graphs are available for the UK, individual countries and English regions.
It is possible to calculate trends for English regions due to the high level of coverage and therefore, larger sample size for many species. Unfortunately, this is not possible for Scotland, Wales or Northern Ireland at present. The counties contributing to each region are displayed in the table below.
On each graph, the dark green line is the smoothed trend, the green dots are the unsmoothed trend, and the pale green line is the upper and lower 85% confidence limits of the smoothed trend.
Select a species and area to view a graph. You can compare two trends for the same species in different areas (UK, Country, English Region) at a time.
Select the menu icon (three horizontal bars in the top right of the graph area) to view export / download options for the graph data.
These graphs may be reproduced, subject to the appropriate acknowledgement of the BTO/JNCC/RSPB Breeding Bird Survey. Spreadsheets containing the data points for each graph may be obtained by submitting a Data Request Form.RESULTS TO 2020
Due to COVID-19 restrictions limiting survey coverage in 2020,
the latest BBS results cover a reduced suite of species
for England only.
Click here to see these results.
Key for English regions
|North West England||Cheshire, Cumbria, Lancashire, Greater Manchester, Merseyside|
|North East England||Cleveland, County Durham, Northumberland|
|Yorkshire and Humber||East Yorkshire, North Lincolnshire, North Yorkshire, South Yorkshire, West Yorkshire|
|East Midlands||Derbyshire, Northamptonshire, Leicestershire & Rutland, Lincolnshire, Nottinghamshire|
|East England||Bedfordshire, Cambridgeshire, Essex, Hertfordshire, Norfolk, Suffolk|
|West Midlands||Birmingham, Herefordshire, Shropshire, Staffordshire, Warwickshire, Worcestershire|
|South East England||Berkshire, Buckinghamshire, Hampshire, Isle of Wight, Kent, Oxfordshire, Surrey, Sussex|
|South West England||Avon, Cornwall, Devon, Dorset, Gloucestershire, Somerset, Wiltshire|
BBS population tables
Visit the Population trend tables page to view the latest BBS trends for the UK as a whole, England, Scotland, Wales, Northern Ireland and region-specific graphs, produced for nine English Government Office Regions.
Working together for seabirds
BTO work supports effective monitoring of our seabirds and aims to provide opportunities for a new generation of seabird surveyors.