Bat sounds have long been a shorthand for darkness in film and audio, because real bats are nocturnal, hard to see and associated with caves, old buildings and Halloween. Online, short animal recordings like this one are shared on soundboards for creators who need a quick, recognisable creature effect without recording wildlife themselves. The clip works because listeners instantly connect squeaking and fluttering wings with bats, even without a visual cue. That instant recognition keeps it useful for spooky edits, games and short videos year after year.