The First Atlas of Wintering Birds in Britain and Ireland: 1981/82-1983/84.
The records were collected to compile as complete a wintering species list as possible for each 10-km square and provide a count of the number of each species seen. The dataset was used to produce the first BTO/IWC Wintering Birds Atlas (Lack P. (1986) The atlas of wintering birds in Britain and Ireland. T. & A.D. Poyser).
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 Lack, P. (1986) The Atlas of Wintering 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 at email@example.com
Date range: Jan 1, 1981 - Jan 1, 1984
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