Limited flight. Glass Beetles aren't particularly good fliers. they must land on something solid at end of their each turn, and they cannot end their turn in air without falling on the ground.
Bite. Melee Weapon Attack: +1 to hit, reach 5 ft., one target. Hit: (1d6 - 1) slashing damage.
Beetle used by drow to kill pests (similar how people in surface use cats) and sometimes also eaten. Because of their beautiful shells they make nice looking pets.