nature preserve in Mpumalanga province, South Africa, on the Olifants River, north of Middelburg. The reserve has an area of 57 square miles (148 square km) and lies around a dam on the Olifants River in a scenic valley that has been restocked with animals once indigenous to the area. These include the eland and other species of antelope, giraffe, zebra, wildebeest, white rhinoceros, and more than 200 species of birds, including the ostrich, fish eagle, goliath heron, and other waterfowl. The Loskop Reservoir, impounded by the dam on the river, is well stocked with fish.