Pygarg in Fausset's Bible Dictionary

dishon. A clean animal (Deuteronomy 14:5). A generic name for the "white rumped (as pugarg means in Greek) antelope" of northern Africa and Syria. The Septuagint has translated the Hebrew by "pygarg"; living near the habitat of the pygarg they were likely to know. The mohr kind is best known, 2 ft. 8 in. high at the croup. The tail is long, with a long black tuft at the end; the whole part round the base of the tail is white, contrasting with the deep brown red of the flanks. Conder (Israel Exploration, July, 1876) makes it the "gazelle".

Link: https://bible-history.com/faussets/P/Pygarg/