Heaps - Of rubbish, formed in this case by the decay of the unburned bricks of which Babylon was built. It is these heaps which have yielded such a large wealth of historical documents in our own days.
Dragons - Jackals Jeremiah 10:22.
Related Commentaries of Jeremiah 51:37
Jeremiah 51:37
37 And Babylon shall become heaps, a dwellingplace for dragons, an astonishment, and an hissing, without an inhabitant.