PYGARG pī’ gärg (דִּישֹׁ֖ן, pygarg, Deut 14:5, KJV, ASV; Ibex RSV; πύγαργος, LXX). Pygarg is derived directly from the LXX, and is said to mean white-rumped; this is true of several deer and antelopes, esp. gazelles. Some authorities have identified it with the Addax, A. nasomaculatus. This is doubtful, for there is no evidence that this desert antelope was ever found N of Egypt, where it has been killed out within the past cent. In summer it is almost white, in winter grayish brown. It stands about three ft. and six inches at the shoulder and has long spiral horns.
International Standard Bible Encyclopedia (1915)
(dishon; Septuagint pugargos; compare proper nouns, "Dishon" and "Dishan" (Ge 36:21-30; 1Ch 1:38-42); according to BDB, Hommel, Saugethiere, derives ... from dush, Arabic das, "to tread," and compare Assyrian dashshu, "mountain-goat"): Dishon as the name of an animal occurs only in De 14:5 in the list of clean beasts. Both the King James Version and the Revised Version (British and American) have "pygarg," which is not the recognized name of any animal whatever. The Septuagint pugargos (from puge, "rump," and argos, "white") was used by Herodotus (iv.192) as the name of an antelope. A white rump is a very common feature of deer and antelopes, and is commonly explained as enabling the fleeing herd easily to keep in sight of its leaders. It has been used as a specific name of Cervus pygargus, the Tartarian roe, and Bubalis pygargus, a small South African antelope. The Arabic Bible has ri’m, "a white gazelle," a kindred word to re’em, the King James Version "unicorn," the Revised Version (British and American) "wild-ox." Tristram, Tristram, Natural History of the Bible, considers dishon to be the addax, Antilope addax or Addax nasomaculatus. There is excellent reason, however, for believing that the range of this African antelope does not extend into Palestine, Sinai or Arabia. For a discussion of the animal names in De 14:4,5, see Zoology.