birdsong

I bought an MP3 player a couple of years ago, because I listen to music all the time at home, and I thought it would be a good idea to be able to listen to music while on the move. I hardly ever use it. For obvious reasons, I wouldn’t consider using it while cycling, but even when I’m merely out walking I’d rather listen to the birds.

In fact, I’ve heard it argued, plausibly, that birdsong was