lol, but it's true you know... Think about it. A complex and intricate web of infested tunnels stretched through a major part of the Misty Mountains. And then the plains in Mordor trampled as far as Frodo and Sam could see with camped orc armies. Then the Moria population. Orthanc's too, though its kind of insignificant compared to the rest. All together thats a lot of orcs...
Have I forgotten anyone?