The Flambeau Duck Whistle produces the natural sounds of Pintails, Wigeon, Teal, and the Drake Mallard.

This call is probably most often used to call Wigeon but a "pip-pip-pip" with this whistle works very well on Teal.  

Very effective at producing the Drake Mallard “Purr” and great when used in conjunction with your usual Mallard Call.

Good instructions card with it that will help you with this often neglected area of calling.