Wiktionary
black rats
n. (black rat English)
Usage examples of "black rats".
There were a couple of outbreaks of killer Black rats some years ago.
His fierce eye gazed out across the mighty army: black rats, brown rats, grey rats, piebald rats, skulking weasels, furtive stoats and sinuous ferrets, all gathered round, their weapons glistening and dripping with the rain.
There were rats around, all right - the loop smears in the barn were proof enough of that - but not the big ones, not the Black rats.
And there's an army of black rats gathering behind it, ready to storm through!