Whistled language isn't all that uncommon: it also happens in some Inuit languages and tonal languages. The even have different airstream mechanisms IIRC: Inuit

Whistled language isn't all that uncommon: it also happens in some Inuit languages and tonal languages. The even have different airstream mechanisms IIRC: Inuit whistled languages use palatal whistling, whereas on Silbo Gomero (pardon the spelling) you whistle into your hands. Check out the Piraha channls, where they also have "hum speech", "yell speech", "musical speech". http://itre.cis.upenn.edu/~myl/languagelog/archives/003175.html http://itre.cis.upenn.edu/~myl/languagelog/archives/003175.h...