Male Black Grouse giving highly distinctive mating call, Skelleftea, Sweden. Black Grouse (Tetrao tetrix) is a large bird in the grouse family. It breeds across Northern Europe in moorland and bog areas near to forest, mostly boreal. These birds have a display or lek in early spring. Black grouse have a very distinctive and well recorded courtship ritual or game. At dawn in the spring, the males strut around in a traditional area and display whilst making a highly distinctive mating call. This process is called a Lek - the grouse are said to be lekking.