The term 'long-horned antelope' refers to two species of African antelope, the ORYX (ORYX gazella) and the ELAND (Taurotragus ORYX). The ORYX is a medium-sized antelope with long, straight horns that can reach up to 1.5 meters in length. It is found in dry, desert regions of Africa and the Arabian Peninsula. The ELAND is the largest antelope in the world, with horns that can reach up to 1.8 meters in length. It is found in grasslands and savannas of southern and eastern Africa. Both species are known for their impressive horns and are hunted for their meat and hides.