Kalahari means ‘large thirst’ in the local language and between November and February summer temperatures can reach well over 40 degrees centigrade. To avoid the dry desiccating heat much of the wildlife has adopted nocturnal habits. Wildlife sound recordist Chris Watson captures the changing soundscape from dusk to dawn, when you can see very little but hear everything; from the close up sounds of insects to the far-carrying contact calls of spotted hyenas. Producer Sarah Blunt