GIS layers showing the abundance and distribution of seabirds in welsh waters. The datasets consist of the raw data showing observations of all seabirds and derived grids showing the density of flying and sitting species on a 3km grid scale and the survey coverage. The purpose of this data capture was to collate data from ESAS and WWT Consulting databases to produce combined database of birds recorded from surveys of Welsh waters. Attribution statement Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved.