Hippotragus leucophaeus or blue antelope. Computer illustration and photo-reconstruction of the bluebuck or blue antelope Hippotragus leucophaeus. The bluebuck or blue antelope is an extinct species of antelope that lived in South Africa until around 1800. It is congeneric with the roan antelope and sable antelope (belonging in the genus Hippotragus), but was smaller than either. It was the first large African mammal to face extinction in historical times, followed by the quagga in 1883.