Melee Attack Roll: +5, reach 5 ft., one target.
Hit: 6 (1d6 + 3) piercing damage, and the Stirge attaches to the target. While attached, the Stirge can't make Proboscis attacks, and the target takes 5 (2d4) necrotic damage at the start of each of the Stirge's turns.
The Stirge can detach itself by spending 5 feet of its movement. A creature within 5 feet can detach it as an action.