There are two scops owls nesting near the villa in Hyères where we've just spent the past three weeks. Their cries at night sound like very regular, neat sounds like a practiced flutist blowing one perfect note in their instruments, always the same, every few seconds. You only hear the note grow louder or weaker as the owl flies about. There are two of them, one living further away and who sings with a slightly deeper note. I've never seen them at all, in all those years. The closest I've ever been was finding a regurgitated pellet full of tiny bones in the garden, once. Other than that, they're as inconspicuous as the wind in the trees.
Friends of ours were staying with us for the weekend. As I chatted with one of them, I asked him if he had heard the owls at night.
'Oh yes,' he said, and laughed. 'My girlfriend wanted to know what that beeping sound was!'
'Huh. Beeping sound?'
'Yeah. City girl.'
That's when I realised that, to people who have never heard owls before, the sound must be confusing indeed, and perhaps not entirely pleasant. I still didn't tell the owls about their 'beeping' voice. You never know. They might get offended.