Put the call in the hand, the end passing of course between the thumb and the index finger, knock with small strokes. "Gli - gli, gli - gli"; so sings the female, day and night.

These beautiful hand made bird calls have been made in France since 1970 and are put together using natural sustainable products. Each birdcall is presented in a handmade wooden box with a sketch of the bird and instructions for use printed inside.

Link to Tutorial: https://www.youtube.com/watch?v=kI0GE8FjbAM