Tawny Owls are spending their nights in establishing their winter territories. The lighter calls are presumably the younger among them. At times the shouting match reaches a crescendo as two birds throw their calls at one another, often within the relatively confined space of the garden. We hear hear the scrape of their talons as the land on the ridge tiles. In a semi sleeping state their arguments come and go. The outside night world making small incursions into the house and then drift away.