Stirge (CR 1/2)

Tiny Magical Beast
Alignment: Always neutral
Initiative: +4 (Dex); Senses: darkvision 60 ft., low-light vision, Listen 4, and Spot +4


AC: 16 (+2 size, +4 Dex), touch 16, flat-footed 12
Hit Dice: 1d10 (5 hp)
Fort +2, Ref +6, Will +1
Speed: 10 ft., fly 40 ft. (average)
Space: 2 1/2 ft./0 ft.
Base Attack +1; Grapple -11
Attack: Touch +7 melee
Full Attack: Touch +7 melee
Damage: Attach
Special Attacks/Actions: Attach, blood drain
Abilities: Str 3, Dex 19, Con 10, Int 1, Wis 12, Cha 6
Special Qualities:
Feats: Weapon Finesse
Skills: Hide +14, Listen 4, and Spot +4
Advancement: -
Climate/Terrain: Warm marshes
Organization: Colony (2-4), flock (5-8), or storm (9-14)
Treasure: None

Source: Monster Manual

Combat

A stirge attacks by landing on a victim, finding a vulnerable spot, and plunging its proboscis into the flesh. This is a touch attack and can target only Small or larger creatures.

Attach (Ex): If a stirge hits with a touch attack, it uses its eight pincers to latch onto the opponent's body. An attached stirge has an AC of 12.

Blood Drain (Ex): A stirge drains blood, dealing 1d4 points of temporary Constitution damage each round it remains attached. Once it has drained 4 points of Constitution, it detaches and flies off to digest the meal.