Minecraft wiki entry for Exploring_an_ancient_city, associated text: As mentioned above, a sculk shrieker has a range of 16 blocks, and shrieks for 4.5 seconds. This gives a small amount of time to run incase a Warden appears due to 2 other shriekers being activated earlier. Ideally, the player should have a safe escape route leading all the way out of the Ancient City, towards the surface, to be safe.