in northern Tanzania and the first T. oryx fossil appears in the Holocene in Algeria. In 2010, a genetic study was made basing on the evolutionary history of common elands. Located in the sub-Saharan savanna biome of East and Southern Africa, the study used methods including analysis of mitochondrial DNA control-region fragments from 122 individuals to learn more about various topics, such as the phylogeography, genetic diversity, and demographic history of the species. The conclusions strongly supported the presence of a longer-standing population in the south and a mosaic of Pleistocene refugia in the east. Today, their extinction from these parts is thought to be due to colonization. The similarity of dates obtained from more studies indicates a significant event around 200 ka, which had brought a great change in the genetic history of the species. Habitat and distribution Common elands live on the open plains of Southern Africa and along the foothills of the great southern African plateau. The species extends north into Ethiopia and most arid zones of South Sudan, west into eastern Angola and Namibia, and south to South Africa. However, a low density of elands exists in Africa due to poaching and human settlement. Elands prefer to live in semiarid areas that contain many shrub-like bushes, and often inhabit grasslands, woodlands, subdesert, bush, and mountaintops with altitudes of about . Elands do, however, avoid forests, swamps and deserts. The places inhabited by elands generally contain Acacia, Combretum, Commiphora, Diospyros, Grewia, Rhus, and Ziziphus trees and shrubs; some of these also serve as their food. Eland can be found in many national parks and reserves today, including Nairobi National Park and Tsavo East National Park, Tsavo West National Park, Masai Mara National Reserve, (Kenya); Serengeti National Park, Ruaha National Park and Tarangire National Park, Ngorongoro Crater, (Tanzania); Kagera National Park (Rwanda); Nyika National Park (Malawi); Lake Mburo National Park (Uganda); Kidepo Valley National Park (Uganda); Luangwa Valley and Kafue National Park (Zambia); Hwange National Park, Matobo National Park, Tuli Safari Area and Chimanimani Eland Sanctuary (Zimbabwe); Kruger National Park, Kgalagadi Transfrontier Park, Giant's Castle and Suikerbosrand NR (South Africa). They live on home ranges that can be 200–400 km2 for females and juveniles and 50 km2 for males. Ecology and behavior Common elands are nomadic and crepuscular. They eat in the morning and evening, rest in shade when hot, and remain in sunlight when cold. They are