The buzz comes from Old MacDonald Duck, a Donald Duck cartoon released on 12 September 1941, where Donald struggles to run a farm while a fly keeps pestering him. The short effect was later catalogued by Hollywood Edge as Fly Buzz, which helped it circulate beyond the cartoon as a reusable library sound. Animators and editors still reach for it because a fly is instantly recognisable from sound alone, and the brief, darting buzz sells a near-miss without words. Its cartoon origin keeps it playful rather than realistic, which suits comedy, animation and light-hearted edits.