'Beasts of the Field' in the Bible

My inheritance is like a speckled bird to Me; the birds all around are against her. Go, gather all the beasts of the field, bring them to devour.

For so says Jehovah of Hosts, the God of Israel, I have put a yoke of iron on 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.