Acid Ant

Explosive Death. When the ant is reduced to 0 hp, it explodes in a burst of acid. Each creature within 5 feet of the ant must succeed on a DC 11 Dexterity saving throw or take 5 (2d4) acid damage.

Keen Smell. The ant has advantage on Wisdom (Perception) checks that rely on smell.

Acid Spit. Ranged Weapon Attack: +3 to hit, range 20/60 ft., one target. Hit: 5 (2d4) acid damage and the target takes 1 acid damage at the start of its next turn unless the target immediately uses its reaction to wipe off the spit.

Bite. Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 3 (1d4 + 1) piercing damage plus 2 (1d4) acid damage.