Information by area

What are the important areas for the different bird species? Search for numbers and trends for breeding birds, migrants and winter visitors per Natura 2000 area (insofar as designated under the Birds Directive) or other important bird area in the Netherlands.

View data by area

Indexes and numbers

Did species increase or decline in recent years? National index and trend figures per monitoring network can be viewed in the files below. The data can be used freely, provided Sovon is mentioned as the source.

View the indexes
The Common House Martin - foto: Harvey van Diek

The Common House Martin

De tijd om Huiszwaluwen te tellen is weer aangebroken. Heerlijk op een zwoele zomeravond op de fiets door een dorp of wijk rijden en op zoek naar nesten.

Alles over the Common House Martin

Birds in The Netherlands

Thanks to the national bird counts, Sovon has insight into the development of numbers of Dutch bird species, their distribution and developments in areas important to birds, such as Natura 2000 areas.

The information is based on the monitoring networks that Sovon Vogelonderzoek Nederland coordinates in collaboration with Statistics Netherlands (CBS) and other organisations. The basis of the monitoring is formed by the Ecological Monitoring Network (NEM), to which regional and provincial monitoring networks are linked. The monitoring is made financially possible by the central government and the provinces. The information on this website is supplemented by the atlas projects carried out by Sovon, including Vogelatlas and LiveAtlas. The information is updated at least annually and is free to use provided that the recommended source is acknowledged graphs and is mentioned. See also the explanation with more details (in Dutch) about the results displayed.

The species and areas pages were created with co-funding from: