Like their ancient counterparts, these warblers mimic the warbling, chirping and twittering of birds by slightly tilting the whistle as the sound bubbles through water in the vessel.

Instructions: Start by filling the bird with water and then gently blow into it. Empty small amounts of water until blowing produces the sweet and realistic sound of a bird warbling.

You can alter the sound by tilting the bird forward and back to create a range of warbling and chirping sounds. This range of sounds is created when air is blown into the stem, agitating the water to produce a gurgling sound which in turn, combines with the whistle to imitate the chirping of a bird.

You can experiment with different water levels, tilt angles and breath forces to create a range of bird calls.

stocking stuffers anyone?