Whistled language

Languages communicated by whistling are extremely rare among the world's languages. Such languages ignore phonemes and communicate solely based on tone, length and stress.

Languages which are whistled include Pirahã, many African languages, including Yoruba[?] and Ngwe, and some dialects of Zapotec. French is whistled in some areas of western Africa, and Silbo is a whistled dialect of Spanish spoken in the Canary Islands. Interestingly, no whistled language is spoken by women.