As one of the first creatures to have been created when its original aspect, the Zz'gashi Dune Runner, was assimilated into the Zerg Swarm, the Zergling is a dog-sized insect-like creature which excels at rushing to the enemy and tearing them down with their sharp cloven mandibles and teeth. Their small size makes them extremely weak on their own, but they are terribly dangerous when in group. As their genetic code is extremely simple, two of them can hatch from an egg, easily accumulating their numbers. En mass, they can effortlessly overrun an enemy outpost within a matter of minutes, swarming over them like a flood of claws and teeth.