Spawners are large OD with tusks and a garbage bin on their back out of which spawn normal OD. The Player first encounters them when at the Bora Bora Water factory and the Automated voice lady promotes you to "figure out where all those OD are coming from". Like Herkers they have a bigger health bar and are therefore harder to kill. But considering the longer one is alive the more OD you have to fight; It's worth it to shoot a couple TNT-Teddies at it the minute you see it. For unknown reasons, any OD spawned by a Spawner will die after one is killed.