Instructions
Open both hands so that your palms face upwards. Lay your dominant hand over the other one so that your hands make an "X" shape.
Curl your hands so they form a cup. Then, move the fingers of your dominant hand so they point upward toward the sky. Your hands should form an airtight seal around the space between your palms.
Hold the sides of your thumbs close together, leaving just a small gap between them. Lift your hands to your lips and blow slowly through the gap between your thumbs. If no sound comes out, make sure that air is not passing through your cupped hands. Reposition and try again. It may take you several tries before you can make the loon call.