This sound is identified as a raw audio file for the second flea "awoo" from Hollow Knight: Silksong. It circulates mainly among players, fan editors, and game-audio collectors who isolate creature noises from trailers, previews, or shared asset recordings. Short enemy vocal clips like this stay useful because they are instantly readable, easy to layer into edits, and recognizable to fans of indie action games even when used outside the original game context.