VogelbalansState of Birds in the Netherlands 2025

In the State of Birds, Sovon lists the most important current developments. Which species are increasing in number and which are becoming less common? Thanks to more than 50 years of counts and research by many volunteers and professionals, we can make statements about the trends of 200 species of breeding birds and 204 migratory and wintering bird species. Knowledge about the possible causes behind these changes is also explained. The 2025 edition focuses on a number of striking and current developments. For example, population developments of certain species at the Dutch level are compared with those at the European level. Three particularly long series of counts in different areas of our country are highlighted and discussed. How have bird populations changed there and what factors have influenced this? Every three years, the entire East Atlantic flyway is monitored, an enormous effort involving tens of thousands of volunteers in 35 countries. One species that also uses this flyway is the Barnacle Goose. Based on two studies, we discuss new insights into this species. In short, a State of Birds full of relevant information. After all, birds remain important indicators of our relationship with nature.