Have the latest scientific findings about distribution and change at your fingertips, including chapters telling the atlas story and highlighting the factors influencing our changing bird fauna. Bird Atlas 2007-11 is the most complete and comprehensive overview of bird distribution and change in Britain and Ireland, and contains over 1300 maps describing patterns of distribution, abundance and change for nearly 300 species. The Bird Atlas 2007-11 has been compiled from data collected by over 40,000 volunteer surveyors through timed visits, roving records and other sources, over four summers and winters.