Nisbat
this small insect was rasied by the Yuuzhan Vong as an organic tracking mechanism. Each nisbat in a hatching could sense the presence of its hatchmates over a distance. As one member got closer to another, the nisbat would emit a bussing noise. This buzzing got louder as the nisbat neared its hatchmate. Thus, the Yuuzhan Vong could implant a nisbat into the body of a being and use another nisbat - a hatchmate of the implant - to locate the being by the strength of the buzzing sound.