Carrion wasps are a species native to Cruxas III. They appear to live up to their namesake, feeding on the bodies of fallen creatures. Plot branch : Kerrigan chooses to evolve the Swarm Host During the Second Great War, the essence of the carrion wasps was assimilated into the Zerg Swarm. Through this, the zerg were able to develop the carrion swarm host strain. Plot branch ends here