The thrall herder, a ground-based vehicle utilized by the Yuuzhan Vong, served the purpose of managing Chazrach soldiers held in servitude. Its appearance was similar to an enormous beetle-like organism, characterized by a multitude of tiny appendages. This vehicle incorporated dovin basals as a defensive measure, capable of deflecting incoming projectiles such as missiles and laser fire. Furthermore, the dovin basals generated a void that could draw in diminutive organisms, including insects, avian creatures, and bats. Upon the destruction of a thrall herder, the Chazrach under its control would disperse.
The initial encounter with thrall herders by the New Republic occurred during the invasion of Dantooine.