This is how Silbo sounds
Silbo was created by the earliest inhabitants of the Canary Islands, the Guanches, in order to communicate across gorges and precipices without the need to go there physically. It originally reproduced the language of the aborigines –Canarian Berber–, and was used not only in La Gomera, but also in El Hierro, Tenerife and Gran Canaria. But it was not adapted to Spanish until the 16th century, after the conquest of the Canary Islands by the Castilian Crown. From that moment on, Silbo Gomero was passed down from generation to generation to the present day, becoming a symbol of Canarian culture.