The Blues are the small blue birds from Rovio's Angry Birds series, first launched in 2009, whose special ability is to split from one bird into three while flying. Their cheerful selection sound comes from the game's character choice screens, where each bird gets a short vocal cue before a level begins. As Angry Birds grew into sequels, cartoons and merchandise, fans began ripping and sharing these short game sounds on soundboards for edits and memes. The Blues cue endures because it is instantly recognisable to players and works as a light, mischievous signal for teamwork or a three-way split.