Charles Ellicott Commentary Isaiah 18:6

"They shall be left together unto the ravenous birds of the mountains, and to the beasts of the earth; and the ravenous birds shall summer upon them, and all the beasts of the earth shall winter upon them." — Isaiah 18:6 (ASV)

They shall be left together unto the fowls of the mountains ... —The figure and the reality are strangely blended. The grapes of that vintage cut off by those pruning-hooks are none other than the carcasses of the host of the Assyrians left unburied, to be devoured by the dogs and vultures.