Defassa waterbucks, Lake Manyara National Park, Tanzania

The waterbuck is a large, robust animal; males are generally about 25 percent larger than the females. Waterbucks have large, rounded ears and white patches above the eyes, around the nose and mouth and on the throat. Only the males have horns, which are prominently ringed and as long as 40 inches. The horns are widely spaced and curve gracefully back and up. They are sometimes used with lethal results when males fight one another over territories. The waterbuck has a shaggy brown-gray coat that emits a smelly, oily secretion thought to be for waterproofing. In East Africa two types occur, the common waterbuck and the defassa waterbuck, distinguished only by the white pattern on the rump. The common waterbuck has a conspicuous white ring encircling a dark rump, while the defassa has wide white patches on either side of the rump. As its name would indicate, the waterbuck inhabits areas that are close to water in savanna grasslands, gallery forests and riverine woodlands south of the Sahara. Such habitats not only provide sustenance but long grasses and watery places in which to hide from predators. This photograph was taken when Eliot Elisofon was on assignment for American Broadcasting Company and traveled to Africa from June 1966 to early August 1966.