It turns out that if you blow on the slit in the back of a cicada shell, you can produce a high-piched whistle. Remember, you read it here first! Does it sound like a cicada? Of course not. It sounds like a very small appliance of unclear function. I saw an ad that said Hunters Wanted, & realized I was still wearing a blaze-orange vest. The sun had set hours ago, following an obscure schedule of its own devising.
From Via Negativa