What is "xirula"

The xirula (, spelled chiroula in French, also pronounced txirula, (t)xülüla in Zuberoan Basque; Gascon: flabuta; French: galoubet) is a small three holed woodwind instrument or flute usually made of wood akin to the Basque txistu or three-hole pipe, but more high pitched and strident, tuned to C and an octave higher than the silbote. The sound that flows from the flute has often been perceived as a metaphor for the tweet cadences of bird songs. Some scholars point out that flutes found in the Caverns of Isturitz and Oxozelaia going back to a period spanning 35,000 to 10,000 years ago bear witness to the early presence of the instrument's forerunner in the region, while this view has been disputed.