The sound comes from Angry Birds, Rovio's hugely popular mobile game first released in 2009. As the series spread across phones, web videos and parody edits, the bird flight noise became one of the most recognizable game sound effects online. People still use it because the audio instantly communicates slingshot motion, cartoon speed and incoming impact in less than two seconds. It remains common in gaming compilations, short meme edits and fail videos where something gets hurled through the frame.