New Defender's Study Bible Notes
39:13 wings and feathers. There is a question whether or not the bird described in Job 39:13-18 is really an ostrich, or some extinct bird. In the other three occurrences of this word (Hebrew notsah) it is translated “feathers,” in no case referring to ostriches. The characteristics of the bird described in these verses correspond only in part to those of the modern ostrich. The reference to “wings” would seem pointless, for the ostrich is flightless.