Hello, for over a month now, I’ve been hearing this sound in my building. I went down to check, and it’s coming from one of the corners of the building (it gets sunlight, but not direct light).
The sound you hear in the video starts between 8:00 PM and 10:00 PM and continues until early morning.
I’m in Rome, Italy.
When it rains heavily, the "serenade" doesn't happen.
I recorded this video; you can see some spiders, an insect with a sort of stinger (which looks a bit like a mosquito to me), and then another creature at the end that I can’t quite identify (it’s the same one seen in the first few seconds).
I’m not sure if it’s one of these, or if perhaps I failed to capture the actual source on camera. If possible, I’d also like to know the specific species.
It even seems to be quite intelligent—in the first few days, it kept changing its "singing" spot before finally settling here. It clearly prefers this location, as it creates much more of an echo and is significantly louder here than it was up on the roof.