The Walking Dead - Cockroach Edition
The Emerald Cockroach Wasp is quite the little troublemaker. Although it has beautiful shimmering blue and green colours on the outside, it is masking the malevolence that lies beneath.
The wasp actually uses a cockroach as a host to its unborn children. There is a size difference, and the cockroach should actually win in a fight, but the wasp has developed a deadly neurotoxin (GLaDOS, reference there for you).
Firstly, the female Emerald Cockroach Wasp delivers a blow to the abdomen of the cockroach, this renders it temporarily paralysed. Following this, the wasp then delivers another blow to the roach's brain, into the sub-esophageal ganglia. Now, this doesn't kill the cockroach, as the wasp needs it to hold her eggs, what this does is basically take away the free will of the cockroach. Thus, the zombie cockroach enters the picture. Due to the venom, the cockroach no longer feels the need to escape, so it is led around by the wasp by its antennae.
After the zombie creation, the wasp leads the cockroach to her burrow and lays her eggs on its legs. During the following month, the cockroach remains still and obedient while the larvae hatch and mature inside the cockroach... then eat their way out (much like the bursting through the chest scene in "Alien," only really little.)