And the wild asses did stand in the high places, they snuffed up the wind like dragons; their eyes did fail, because there was no grass.
The wild donkeys did stand in the high places - they repair to "the high places" most exposed to the winds, which they "snuff in" to relieve their thirst.
Eyes - which are usually most keen in detecting grass or water from the 'heights,' so much so that the traveler guesses from their presence that there must be herbage and water near; but now "their eyes fail."
Dragons - jackals (Henderson). Rather the reference is to the great boas and python serpents, which raise a large portion of their body up in a vertical column, 10 or 12 feet high, to survey the neighbourhood above the surrounding bushes, while with open jaws they drink in the air. These giant serpents originated the widely-spread notions which typified the deluge and all destructive agents under the form of a dragon or monster serpent; hence, the dragon temples, always near water, in Asia, Africa, and Britain-e.g., at Abury, in Wiltshire: a symbol of the ark is often associated with the dragon as the preserver from the waters (Kitto's 'Biblical Cyclopaedia')