If on a hot summer evening in Japan, you lean out of the window of your stifling apartment, often you will hear a whistle-humming like that of high-voltage electricity pylons. But it is actually millions of insects, all calling to each other.
And if on that hot summer evening in Japan, you lean out and hear only the distant silence of the city, and you jingle a bunch of keys, the insects will call back to the ultrasonic rustle, and then call back to each other, and they will keep going all night, calling to each other because they are calling to each other.
May 1998. A street in the old merchants' quarter, Nara.