Left 2 DieEdit
Spotters are zerg NPC units found in the map "Left 2 Die." Unlike overseers, they are capable of attacking ground and air units directly. They possess a contaminate ability similar to that of the overseer which can be used on structures. Unlike a regular overseer, they have a little round mouth and their regular, orange eyes are green.
Spotters appear as special infested on the Dead of Night mission of Co-op Missions. They are flying terrors that can deal bonus damage to structures, disable structures and give high ground vision for ranged attackers.