SHRIEKER (Wandering Fungus) (Walking Toadstool)

Source: http://www.wcbvaults.com/gallery/monsters.php

FREQUENCY: Common
NO. APPEARING: 2-8
ARMOR CLASS: 7
MOVE: 1"
HIT DICE: 3
%IN LAIR: 0%
TREASURETYPE: Nil
NO. OF ATTACKS: 0
DAMAGE/AttACK: Nil
SPECIAL ATTACKS: Nil
SPECIAL DEFENSES: Noise
MAGIC RESISTANCE: Standard
INTELLIGENCE: Non-
ALIGNMENT: Neutral
SIZE: S to L <(3-10 hp = S> <11-18 hp = M> <17-24 = L)>
LEVEL/X.P. VALUE: I | 5 + 1

Shriekers are normally quiet, mindless fungus which are ambulatory.
They live in dark places beneath the ground.
Light within 30' or movement within 10' will cause them to emit a piercing shriek which lasts for 1-3 melee rounds.
This noise has a 50% chance of attracting wandering
monster each round thereafter. Purple worms and shambling mounds
greatly prize shrieker as food.