This morning, just like on many mornings over the past 3.5 years, Den Hartigh runs through his forest in the Breveen. “Do you hear that?” He says. “The black woodpecker.” Thousands of insects come to the dead wood. This also ensures that more birds also find the forest near Leersum. “That means a lot for your biodiversity,” he says. “This way everything happens thanks to the Valwind.”