started doing this a lot at work lately. very fun, perfect thing to do when i’m waiting for stuff. i can’t like whistle a tune or anything it just sounds like a bird chirping cause i can’t sustain it as i suck the air in which is just how i learnt to do it.
found out today via the linked wikipedia page, there used to be an international whistling convention and silbo gomera is a whistled language used in la gomera, one of spain’s canary islands.