n large animal 

Perception +11; echolocation (precise) 40 feet, low-light vision

Skills Acrobatics +8, Athletics +8, Stealth +8

Str +4 Dex +2 Con +3 Int -4 Wis +3 Cha -2

Echolocation A bat can use its hearing as a precise sense at the listed range.

AC  18; Fort +9, Ref +8, Will +7

HP 30

Wing Thrash [R] Trigger An adjacent enemy damages the giant bat. Effect The bat makes one or two wing Strikes—one against the triggering creature and one against another adjacent creature.

Speed 15 feet, fly 30 feet

Melee [>] fangs +10, Damage 1d10+4 slashing

Melee [>] wing +10 (agile), Damage 1d6+4 piercing

Bestiary, page 39.