This major new atlas presents the most comprehensive assessment of seabird distribution yet produced. It provides detailed data for 51 species, covering the region of the North- and South-west Atlantic, Irish Sea, North Sea, and English & Bristol Channels, and is based on the coordinated efforts of all the countries bordering these waters. Each species account includes maps of distribution for various periods throughout the year. Survey methods used are summarised, as are breeding populations for selected species.