To Imitate at least once this song that resembles the description of a mountain slight ... You have three openings, clog easily with the tip of your fingers while taking the bird call in the mouth. Blast qujelques high notes (three) then serious song and then trill with a drop-down "Huit Huit Turli UU Ue ..." (Also possible aspirant). Easier will be to imitate his art before the rain.