Freeman Tweaked Blackbird D Whistle - NEW 2013 Model Has the beloved clear, birdlike tone of the mass-produced Feadog whistles, but with a clearer tone and easier playability. Elimates the uneven register issues that show up in mass-produced whistles. High notes stay sweet and pure rather than going shrill. Plays in tune. The NEW 2013 model features an attractive brass ring around the base of the mouthpiece to improve durability and prevent cracking when the whistle is tuned (shown in second picture)