See also Hab. i. 6-8, in which the prophet speaks of the Chaldeans, "that bitter and hasty nation, which shall march through the breadth of the land, to possess the dwelling-places that are not theirs.
"They are terrible and dreadful: ... and their horsemen shall spread themselves, and their horsemen shall come from far; they shall fly as the eagle that hasteth to eat."
There is also a curious passage in the Book of Proverbs, chap. xxx. ver. 17, which alludes to the carnivorous nature of the bird: "The eye that mocketh at his father, and despiseth to obey his mother, the ravens of the valley shall pick it out, and the young eagles shall eat it."
Allusion is made in several passages to the swiftness of the Vulture, as well as its voracity. See, for example, a portion of David's lamentation over the bodies of Saul and Jonathan, who, according to the poet's metaphor, "were lovely and pleasant in their lives, and in their death they were not divided; they were swifter than eagles, they were stronger than lions."
The "bitter" people—namely, the Chaldeans—are again mentioned in a very similar manner by the prophet Jeremiah: "Our persecutors are swifter than the eagles of the heavens; they pursued us upon the mountains, they laid wait for us in the wilderness" (Lam. iv. 19).
There is something peculiarly appropriate in employing the Vulture as an image of strength and swiftness when applied to warriors, the bird being an invariable attendant on the battle, and flying to the field of death with marvellous swiftness. All who had ever witnessed a battle were familiar with the presence of the Vulture—the scene of carnage, and the image which is employed, would be one which commended itself at once to those for whom it was intended. And, as the earlier history of the Jewish nation is essentially of a warlike character, we cannot wonder that so powerful and familiar an image should have been repeatedly introduced into the sacred writings.
The wonderful powers of sight possessed by this bird are mentioned in the passage from Job xxxix. which has already been quoted.
Here it may be as well to say that, piercing as is the vision of the Vulture, its visual powers have been much exaggerated. It certainly does possess a vision of no ordinary capacity, which is able to assume either a telescopic or a microscopic character, by means of a complex and marvellous structure, which can alter the whole shape of the organ at the will of the bird.
Not only can the eye be thus altered, but it changes instantaneously, so as to accommodate itself to the task which it is to perform. A Vulture, for example, sees from a vast height the body of a dead animal, and instantly swoops down upon it like an arrow from a bow. In order to enable the bird to see so distant an object, the eye has been exercising its telescopic powers, and yet, in a second or two, when the Vulture is close to its prey, the whole form of the eye must be changed, or the bird would mistake its distance, and dash itself to pieces on the ground.
To describe this beautiful piece of mechanism would be outside the scope of the present work; but the reader can find it in every good work on comparative anatomy, and is strongly advised to make himself master of the means by which a result so apparently impossible is secured.