Just your run-of-a-mill bat.
Minor Bat (CR 1/6)
XP 65
N Diminutive Magical Beast
Init +2; Senses Blindsense 20 ft., low-light vision; Perception +6
DEFENSE
AC 16, touch 16; flat-footed 14 (+2 Dex, +4 size)
hp 3 (1d10-2)
Fort +0, Ref +4, Will +2
OFFENSE
Speed 5 ft., Fly 40 ft. (good)
Melee Bite +6 (1d3-4)
Space 1 ft.; Reach 0 ft.
Special Attacks Blood Drain
STATISTICS
Str 1, Dex 15, Con 6, Int 2, Wis 14, Cha 5
Base Atk +0; CMB -2; CMD 3
Feats Weapon Finesse
Skills Fly +16, Perception +6; Racial Modifiers Perception +4
SPECIAL ABILITIES
Blood Drain (Su)
Once per day, a bat can drain the blood from a target within 30 feet. The target must make a Fortitude save (DC 11) or take 1d8 points of shadow damage and the bat is healed for that much. Blue mages may learn this ability as a 1st level spell (Knowledge: Arcana DC 17).