They are just a few birds, in danger of becoming locally extinct.
In 2012 and 2013, black grouse were imported from Sweden to increase the Salland numbers. However, that did not work: according to research because there was not enough food. The soil contained too much nitrogen, leading to fewer insects on which black grouse chicks feed.
Now, measures have been taken, like removing topsoil, to decrease the nitrogen.
Regional broadcaster RTV Oost reports today that there are plans to bring black grouse from Sweden again.