'Beasts of the Field' in the Bible

My heritage is unto me like a speckled bird of prey, the birds round about are against her; come you, assemble all the beasts of the field, come to devour.

And now have I given all these lands into the hand of Nebuchadnezzar the king of Babylon, my servant; and the beasts of the field have I given him also to serve him.

For thus says the LORD of hosts, the God of Israel; I have put a yoke of iron upon the neck of all these nations, that they may serve Nebuchadnezzar king of Babylon; and they shall serve him: and I have given him the beasts of the field also.