Things You'll Need
Instructions
Hold the handle of your quack whistle and place the blowing end into your mouth. Press your lips against it firmly.
Blow into the quack whistle while saying short syllables such as "quack" to create the basic quacking sound from your whistle. Blow short and quick to more closely simulate the quacking sound of a duck.
Vary the force with which you blow into the quack whistle to create a wavering tone. Use this wavering tone to better simulate the natural call of the duck. Try to make the tone raspy sounding for the best effect.
Change the tone and speed of your calls to mimic the sounds of a duck more fully. Do not call repeatedly or you may scare away or irritate the ducks and make them fly away.
Repeat the steps until you have successfully called ducks to your hunting position.