It's late and there's a bird outside, singing. Was trying to figure it out. Nightingale? Thought maybe. Found a few nightingale videos on YouTube, but for some reason all YouTube videos are muted now. There's a site with a bunch of bird songs, nightingale among them. Couldn't make a positive match, though.
Then I decided that surfing around looking for positive proof of the bird's identity on the web was very much beside the point.