The First Atlas of Breeding Birds in Britain and Ireland: 1968-1972.
A dataset of the distribution of the breeding birds of Britain & Ireland from 1968 to 1972, generated using a list of the species observed within each 10km square over the survey period.
Full details of the methods used in the field, how fieldwork was organised and the interpretation of the maps is provided in the published atlas Sharrock, J.T.R. (ed.) (1976) The Atlas of Breeding Birds in Britain and Ireland. T. & A.D. Poyser, Calton or from the British Trust for Ornithology website at www.bto.org/birdatlas/previous/old_methods.htm. Specific queries as they relate to the Republic of Ireland should be made to BirdWatch Ireland www.birdwatchireland.ie
Language of Data