Sources of water flooding the Okavango Delta lie on the extremely wet hills of Angola north of Botswana. From here, the Okawango River flows south through Namibia inland to the Kalahari Desert. In its middle course it forms part of the border between Angola and Namibia, and then flows into to Botswana. It is a unique river that does not flow into the ocean, but spills over the plains of the Kalahari desert. This is done in the winter, in the dry season, from June to October, when all other rivers are dry. This causes a huge amount of animals to migrate to the Delta from areas that do not provide enough pasture during winter drought. It is the best time for car safaris in the Moremi reserve and trips with a traditional mokoro dugout in the endless waters of the Okavango backwaters in search of animals and many species of birds inhabiting hundreds of islands resulting from high water levels.
The Okavango Delta has been recognized as a UNESCO World Heritage Site.
