The main project goal is to use common birds as indicators of the general state of nature using scientific data on changes in breeding populations across Europe.
PECBMS combines national species indices in supra-national indices for individual species for Europe, EU and their regions (New and Old EU, and West, South, North and Central & East Europe). All indices are annually updated but only European species indices and trends are published – see the latest 2018 update.
PECBMS produces indicators for Europe, EU and their regions (New and Old EU, and West, South, North and Central & East Europe) for common farmland, common forest, and all common birds. All indicators are annually updated and published – see the latest 2018 update.
Many European bird monitoring schemes produce their own national wild bird indicators, some of them are also used as official indicators in the country. See the overview of production of national common bird indicators and their use in Europe.