Botswana has diverse areas of wildlife habitat. In addition to the delta and desert areas, there are grasslands and savannas, where blue wildebeest, antelopes, and other mammals and birds are found. Northern Botswana has one of the few remaining large populations of the endangered African wild dog. Chobe National Park, found in the Chobe District, has the world's largest concentration of African elephants. The park covers about  and supports about 350 species of birds.