Nang hul

In the Star Wars New Jedi Order series of novels, a thud bug is a type of insect engineered by the Yuuzhan Vong and often used at leisure by Yuuzhan Vong warriors. The thud bug is basically a beetle that has sharp, jagged appendages on its sides. Its wings are extremely powerful and emit a loud buzzing sound when active. A thud bug only flies when its Vong warrior throws it at a victim. When a thud bug is thrown at a victim, it begins flying toward its target. Its wings are extremely sharp as well. When it hits skin, a "thud" is emitted, hence its name. If the thud bug misses then it flies in a large loop back to its Yuuzhan Vong warrior. Thud bugs can be killed with a lightsaber, but their carapace is very tough and usually can not be broken in normal combat. If a thud bug becomes lodged in the ground then it can free itself using its wings and sharp legs.