Giant Dragonfly (5e Creature)
From D&D Wiki
Medium beast, unaligned
Bite. Melee Weapon Attack: +2 to hit, reach 5 ft., one target. Hit: 7 (3d4) piercing damage.
Giant dragonflies are ferocious predators found in tropical, sub-tropical, and occasionally temperate regions. They hunt warm-blooded creatures, and can be a menace to livestock. They sometimes get a taste for human flesh.