You may be looking for:
Fast Attack Unit
Left 2 DieEdit
The hunterling appears in the multiplayer map "Left 2 Die." It is a very agile unit, in stark contrast to the brutalisk, and its considerably smaller than it. It is able to jump up cliffs in a similar manner to a reaper. Also, it can use its leap attack to instantly close the distance with a target. If the leap attack is targeted on a specific unit, the hunterling will jump on the unit's back, incapacitating it entirely and allowing the hunterling to attack with its claws unhindered. This ability makes the hunterling especially dangerous against lone targets.
Hunterlings appear as special infested on the "Dead of Night" mission in Co-op Missions. They are fast, agile killers that can jump over cliffs and dive into mineral lines. They have a high attack speed, and their leap stuns their target.