Bird Atlas 2007-11

Scottish mountain scenes. Andy Wilson

Bird Atlas 2007–11 was one of the most ambitious volunteer projects ever undertaken, mapping birds in both winter and the breeding season from every inch of Britain and Ireland.

Bird Atlas 2007–11 was one of the most ambitious volunteer projects ever undertaken, mapping birds in both winter and the breeding season from every inch of Britain and Ireland. Bird Atlas was a partnership between BTO, BirdWatch Ireland and the Scottish Ornithologists' Club. The fieldwork is now complete and we are keen to make the most of the data collected. The BTO aims to go 'Beyond the Maps' to investigate the changes highlighted by Bird Atlas. Discover how the data are being used now for direct conservation work in the UK, and read about BirdWatch Ireland's work.

Data collection is now complete for this project.

Project Lead
Email Contact
birdatlas@bto.org

Project timeline, contributions & findings

Project timeline

  • November 2007 - 40,000 volunteers begin atlas surveying
  • September 2011 - Survey work completed
  • November 2013 - Printed atlases arrive

Contributions & findings

  • Over the last 40 years the British breeding ranges of 37% of species have contracted, whereas 38% have expanded to new areas. In Ireland, 47% have contracted and 18% expanded
  • 13 species, including Cuckoo, Swallow and Bullfinch, have increased in Ireland and northen Britain but decreased in lowland Britain