Crow cawing has become a staple sound effect online because the call is instantly recognisable and carries strong associations with omens, wilderness, and horror. Editors source recordings of real crows and reuse them across videos, games, and memes to quickly set a mood without showing the bird itself. The harsh, repetitive cry works as shorthand for a quiet outdoor location turning unsettling, which is why it appears in Halloween content, nature edits, prank videos, and dramatic transitions year after year.