Many of the case studies for Nature Needs Half have involved an area within a defined political jurisdiction at the national, provincial or city level. It is important to note however, that nature crosses borders and that an ecological region is often spread amongst many different political jurisdictions. This is the case with NNH case studies including the Maloti-Drakensberg Transfrontier Conservation Area, the South Caucasus Eco-Region, and the Silk Road. The most ambitious and the largest transfrontier conservation area in the world, however, is known as the Kavango-Zambezi Transfrontier Area.