---
obsidianUIMode: preview
cssclasses: json5e-monster
tags:
- compendium/src/5e/mm
- monster/environment/hill
- monster/environment/mountain
- monster/environment/underdark
- monster/environment/urban
- monster/size/medium
- monster/type/beast
aliases: ["Swarm of Bats"]
---
# Swarm of Bats
*Source: SRD / Basic Rules*  

```ad-statblock
title: Swarm of Bats
![](compendium/bestiary/beast/token/swarm-of-bats.png#token)
*Medium beast, Unaligned*

- **Armor Class** 12 
- **Hit Points** 22 (`5d8`)
- **Speed** 0 ft., fly 30 ft.

|STR|DEX|CON|INT|WIS|CHA|
|:---:|:---:|:---:|:---:|:---:|:---:|
| 5 (-3)|15 (+2)|10 (+0)| 2 (-4)|12 (+1)| 4 (-3)|

- **Proficiency Bonus** +2
- **Saving Throws** ⏤
- **Skills** ⏤
- **Senses** blindsight 60 ft., passive Perception 11
- **Damage Resistances** bludgeoning, piercing, slashing
- **Condition Immunities** charmed, frightened, grappled, paralyzed, petrified, prone, restrained, stunned
- **Languages** —
- **Challenge** 1/4

## Traits

***Echolocation.*** The swarm can't use its blindsight while [deafened](rules/conditions.md#deafened).

***Keen Hearing.*** The swarm has advantage on Wisdom ([Perception](rules/skills.md#Perception)) checks that rely on hearing.

***Swarm.*** The swarm can occupy another creature's space and vice versa, and the swarm can move through any opening large enough for a Tiny bat. The swarm can't regain hit points or gain temporary hit points.

## Actions

***Bites.*** *Melee Weapon Attack:* +4 to hit, reach 0 ft., one creature in the swarm's space. *Hit:* 5 (`2d4`) piercing damage, or 2 (`1d4`) piercing damage if the swarm has half of its hit points or fewer.
```
^statblock

## Environment

underdark, mountain, hill, urban