Job 39:13

"Is it not like the quill and feathers of the pious bird" (the stork)? [UMBREIT]. The vibrating, quivering wing, serving for sail and oar at once, is characteristic of the ostrich in full course. Its white and black feathers in the wing and tail are like the stork's.

The goodly wings unto the peacocks? - I believe peacocks are not intended here; and the Hebrew word רננים renanim should be translated ostriches; and the term חסידה chasidah, which we translate ostrich, should be, as it is elsewhere translated, stork; and perhaps the word נצה notsah, rendered here feathers, should be translated hawk, or pelican. The Vulgate has, Penna struthionis similis est pennis herodii et accipitris; “the feather of the ostrich is like to that of the stork and the hawk.” The Chaldee has, “The wing of the wild cock, who crows and claps his wings, is like to the wing of the stork and the hawk.” The Septuagint, not knowing what to make of these different terms, have left them all untranslated, so as to make a sentence without sense. Mr. Good has come nearest both to the original and to the meaning, by translating thus: - “The wing of the ostrich tribe is for flapping; But of the stork and falcon for flight.” Though the wings of the ostrich, says he, cannot raise it from the ground, yet by the motion here alluded to, by a perpetual vibration, or flapping - by perpetually catching or drinking in the wind, (as the term נעלסה neelasah implies, which we render goodly), they give it a rapidity of running beyond that possessed by any other animal in the world. Adanson informs us, that when he was at the factory in Padore, he was in possession of two tame ostriches; and to try their strength, says he, “I made a full-grown negro mount the smallest, and two others the largest. This burden did not seem at all disproportioned to their strength. At first they went a pretty high trot; and, when they were heated a little, they expanded their wings, as if it were to catch the wind, and they moved with such fleetness as to seem to be off the ground. […]

Gavest thou the goodly wings unto the peacocks? - In the previous verses the appeal had been to the wild and untamable animals of the desert. In the prosecution of the argument, it was natural to allude to the feathered tribes which resided there also, and which were distinguished for their strength or fleetness of wing, as proof of the wisdom and the superintending providence of God.