Metroid Database Bestiary

A cousin to the Shredder, the Shrieker waits for prey half-buried in the earth. When it detects a target, it erupts from the ground and takes flight. It releases a sonic blast to stun its target, then sweeps in to feast. Shriekers can generate a stealth field that disrupts most Visors, making them difficult to attack.

As the scan mentions, these offshoots of Shredders can be a little more dangerous because they are able to shoot sonic blasts as well as cloak themselves for a few seconds. Once you have the Echo Visor they are easy to attack, but before that point it might be better to avoid them than to engage in combat.