Bat, Dire
This giant, furry bat is nearly the size of an ox, with dark leathery wings that open wider than two men with arms outstretched.

Dire Bat (CR 2; XP 600)
N Large animal
Init +2; Senses blindsense 40 ft.; Perception +12
AC 14, touch 11, flat-footed 12
(+2 Dex, +3 natural, –1 size)
hp 22 (4d8+4)
Fort +5, Ref +6, Will +3
Speed 20 ft., fly 40 ft. (good)
Melee bite +5 (1d8+4)
Space 10 ft.; Reach 5 ft.
Str 17, Dex 15, Con 13, Int 2, Wis 14, Cha 6
Base Atk +3; CMB +7; CMD 19
Feats Alertness, Stealthy
Skills Fly +9, Perception +12, Stealth +4; Racial Modifiers +4 Perception when using blindsense
Environment forest, hills, jungle, marsh, plains
Organization solitary, pair, or colony (3–8)
Treasure incidental

The dire bat is usually found lairing in desolate areas, resting in caves or other secluded areas during the day and taking to the skies in search of prey at night. This immense creature has an average wingspan of 15 feet and weighs roughly 200 pounds.

The dire bat generally doesn't shelter in groups larger than eight, often living a solitary life. A dire bat prefers feeding on livestock and herd animals.

Dire Bat Animal Companion
Starting Statistics: Size Medium; Speed 20 ft., fly 40 ft. (good); AC +0 natural armor; Attack bite (1d6); Ability Scores Str 9, Dex 17, Con 9, Int 2, Wis 14, Cha 6; Special Qualities blindsense 40 ft.

7TH-Level Advancement: Size Large; AC +3 natural armor; Attack bite (1d8); Ability Scores Str +8, Dex –2, Con +4.