The aims of the Kalahari Conservation Society (KCS) are simple but of prime importance to the future of Botswana, to the conservation of the natural heritage, and indeed to the economy. They are: to promote knowledge of Botswana's rich wildlife and its environment through education and publicity , to encourage and in some cases finance research into issues affecting these resources and their conservation and to promote and support policies of conservation towards wildlife and its habitat. Because of its remoteness from modern developments and its variety of habitats, the Okavango Delta has great bio-diversity. Not only does it have nearly all of the large mammal species of southern Africa, including seasonally high concentrations of elephants, but it provides habitats for an extraordinary varitey of smaller mammals, birds, amphibians, fish and invertebrates. It has the richest flora in Botswana. In other words, its long isolation, and the juxtaposition of waterways with dry land, have allowed a complex and delicate web of interdependent species of plants and animals to develop within the system. These, in turn, influence their habitats - for example, hippos have a role in clearing waterways, and termites are instrumental in the formation of new islands. In short, the Okavango Delta is a unique system.