Species links

BirdTrends partners

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Project partners

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Volunteer fieldwork

Our biggest thankyou is to the volunteers who collected the data on which this website is based. The population trends and other results that we present rely on the sustained, long-term fieldwork of many thousands of BTO volunteers. Our knowledge of the conservation status of the UK's bird populations is possible only as a result of their dedication and enthusiasm. The conservation community owes them all an enormous debt of gratitude for their work. We are also very grateful to the many farmers, land managers and landowners who permitted census work, nest recording and ringing to take place on their land.

Report production and analysis

This website presents the latest in a series of reports, prepared within the partnership between the British Trust for Ornithology (BTO) and the Joint Nature Conservation Committee (JNCC) (on behalf of the Council for Nature Conservation and the Countryside, the Countryside Council for Wales, Natural England and Scottish Natural Heritage), as part of its programme of research into nature conservation.

Mr and Mrs J A Pye's Charitable Settlement provided additional support towards the development of the website.

Our report includes results from the Breeding Bird Survey, which is funded jointly by BTO, JNCC and RSPB. The BBS partners are very grateful to the Environment and Heritage Service in Northern Ireland (now Northern Ireland Environment Agency) and to the Royal Society for the Protection of Birds in Scotland for supporting professional surveys in areas that would otherwise be difficult to cover.

Helen Baker and Ian McLean of JNCC provided helpful discussions, comments and support during the production of the report. David Stroud, Rowena Langston, David Gibbons, Jacquie Clark, Nigel Clark, Jeremy Greenwood and Malcolm Vincent provided helpful comments on earlier editions of this publication.

The analyses would not have been possible without the hard work of many past and present BTO staff who have organised schemes, collated data sets or overseen analyses, including: Sue Adams, Dawn Balmer, Jeremy Blackburn, Jacquie Clark, Mark Collier, Rachel Coombes, Humphrey Crick, Steve Freeman, Mark Grantham, Bridget Griffin, Mike Raven, Brenda Read, Richard Thewlis, Anne Trewhitt and Jane Waters. The work is also heavily dependent on the BTO's computer and database systems overseen jointly by Karen Wright (with Iain Downie). Susan Waghorn and Laura Smith exercised great skill and effort in helping to design and build the website. The site is now maintained by Mandy T Andrews.

We are very grateful to all of the above organisations and individuals for their contributions to this report.


This report should be cited as: Baillie, S.R., Marchant, J.H., Leech, D.I., Renwick, A.R., Eglington, S.M., Joys, A.C., Noble, D.G., Barimore, C., Conway, G.J., Downie, I.S., Risely, K. & Robinson, R.A. (2012) BirdTrends 2011. BTO Research Report No. 609. BTO, Thetford. http://www.bto.org/birdtrends