Shrieker

Shriekers are aerial predators found in Torvus Bog on Aether and relatives to the Shredder. They attack by firing sonic blasts, in the time it takes to charge them, they are invisible. Samus can only target them while they are firing the blasts. If she has the Echo Visor however, she can target them at any time.

Logbook

Logbook entry from a Metroid Prime game: Shrieker

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