Armor Class 11
Hit Points 19 (3d8 + 6)
Speed 20 ft.
Damage Resistances bludgeoning, piercing, slashing
Condition Immunities charmed, frightened, grappled, paralyzed, petrified, prone, restrained, stunned
Senses Blindsight 30 ft., passive Perception 8
Languages —
Challenge 1/2
Spider Climb. If the swarm has a Climb Speed, the swarm can climb difficult surfaces, including along ceilings, without needing to make an ability check.
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 insect. The swarm can't regain Hit Points or gain Temporary Hit Points.
Bites. m +3, reach 5 ft. Hit: 6 (2d4 + 1) Poison damage, or 3 (1d4 + 1) Poison damage if the swarm is Bloodied.
Monster Manual (2024), p. 370