Hundreds of high-pitched squeaks fill the air as a mass of small, carnivorous bats surges forth, all of them hungry for blood.
Bat Swarm CR 2
N Diminutive animal (swarm)
Init +2; Senses blindsense 20 ft., low-light vision; Perception +15
AC 16, touch 16, flat-footed 14 (+2 Dex, +4 size)
hp 13 (3d8)
Fort +3, Ref +7, Will +3
Defensive Abilities swarm traits; Immune weapon damage
Speed 5 ft., fly 40 ft. (good)
Melee swarm (1d6)
Space 10 ft.; Reach 0 ft.
Special Attacks distraction (DC 11), wounding
Str 3, Dex 15, Con 11, Int 2, Wis 14, Cha 4
Base Atk +2; CMB —; CMD —
Feats Lightning Reflexes, Skill Focus (Perception)
Skills Fly +12, Perception +15; Racial Modifiers +4 Perception when using blindsense
SQ swarm traits
Environment any temperate or tropical
Organization solitary, pair, flight (3–6 swarms), or colony (11–20 swarms)
Wounding (Ex) Any living creature damaged by a bat swarm continues to bleed, losing 1 hit point per round thereafter. Multiple wounds do not result in cumulative bleeding loss. The bleeding can be stopped by a DC 10 Heal check or the application of a cure spell or some other healing magic.
Bat swarms dwell in large caves, ruins, or even city sewers—anywhere they can find darkness to hide in during the day and a supply of food to feast upon at night. They are only encountered outside in a group at dawn or dusk, or when they have been startled and forced to flee their lairs.