We're currently being bombarded, physically and sonically, by millions upon millions of cicadas. This is apparently the emergence of a 13-year cycle of the little beasties, and they're everywhere. This morning I opened the car door and half a dozen of them promptly flew inside. It took me at least five minutes to track them all down and evict them, so that I wouldn't be annoyed (let alone deafened) by their incredibly loud noise while I tried to drive.
The sheer quantity of these things is astonishing. According to one source, there are "as many as 1.5 million per acre - or 800 tons a square mile". Even when dealing with plagues of locusts in Africa, I can't remember measuring them in tons of insects per square mile!
For the benefit of those who live in parts of the world where they've never heard the noise produced by cicadas, here are a couple of video clips. The first is of a single cicada, demonstrating how it produces noise by contracting and relaxing internal muscles.
Here's a recording of a wood filled with the little beasties. Turn up the volume to enjoy (?) their song.
Loud, aren't they? When I went outside this morning, it was literally painful to my ears! I seriously considered putting on the electronic hearing protection that I wear at the shooting range.