Wintering waders and waterfowl are a major interest feature of a number of large SSSI and SPA estuaries in the North West of England from the Dee (which lies partly in Wales) to the Solway (which lies partly in Scotland). Recent WeBS data indicates that the size of the populations of a number of these species may not be meeting the threshold for the SSSI sites to be classified as being in favourable or unfavourable recovering condition. In general on these SSSIs the reasons for declining bird numbers are not fully understood. As highly mobile species it is difficult to determine if observed population changes on individual sites are driven by site specific, local landscape, regional or whole flyway changes. A number of species are also highly dependent on undesignated areas close to designated estuaries to deliver some of their ecological requirements. This project will look at population trends by SSSI WeBS sector across the North West coast, compare these trends to SSSI, sub-regional, regional and national trends and collate knowledge on site specific changes and local dependencies beyond the boundaries of the designated site to identify risks to SSSI condition and enable the identification of count sector and SSSI-specific measures to address issues.