Few sounds in nature show the beauty, diversity and structure that we find in birdsong. The song produced by a bird that is frequently found in the place where we grew up has an immense evocative power, hardly comparable with any other natural phenomenon. These reasons would have been more than enough to attract our interest to the point of working on an aspect of this phenomenon. However, in recent years birdsong has also turned into an extremely interesting problem for the scientific community. The reason is that, out of the approximately 10 000 species of birds known to exist, some 4000 share with humans (and just a.
