From Agri Holland:
Of 9 meadow bird species, 8 are declining, most conspicuously so the skylark.
In farmlands, during the last fifteen years, this species declined 60%.
In the 1970s it was still a very numerous species with over 500.000 breeding couples; however, today it is estimated at 50.000 to 70.000.
The only species increasing is the tufted duck.
See the site of the CBS.
Farmland birds in Europe: here.