Monitoring data available to PECBMS comes from 30 countries. The number of countries contributing data and the number of species covered have increased almost every year, as new schemes have started up and provided their data. As a result, all EU Member States but one (Malta) are now represented, along with some neighboring countries. However, since a national bird survey is already underway in Malta, the country is expected to contribute its national data to the PECBMS in the near future.
In 2025 data came from 30 countries: Andorra, Austria, Belgium, Bulgaria, Croatia, Cyprus, Czechia, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Italy, Latvia, Lithuania, Luxembourg, the Netherlands, Norway, Poland, Portugal, the Republic of Ireland, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, the United Kingdom.
The number of countries contributing to the PECBMS has increased since 2003 from 18 to 30. Moreover, monitoring schemes have been established in some new countries recently, and we expect their contribution to the PECBMS soon. The species number for which the PECBMS produces trends and indices has increased, too. It has almost tripled since 2003 (see graph below).

For details and updated information on national monitoring, schemes browse Bird monitoring in Europe.