Sand Screamers were a mysterious species of Rahi found on Voya Nui, named for their screams in the night. There were no recorded sightings of the Sand Screamer by Matoran, and some were not even sure the creature was a Rahi. However, there was evidence such a Rahi existed. Most of the evidence came from the corpses of dead Rahi killed by a mysterious beast, with tracks sighted near them.