Didn't watch the video, just wanted to tell something which I think of as anomaly since years, which can't be good. Which is birds singing loudly in the night.

Didn't watch the video, just wanted to tell something which I think of as anomaly since years, which can't be good. Which is birds singing loudly in the night. Been out walking at about 2:00 AM last night. Loudest I've noticed so far, not localised in some spot, all along the way for several kilometers. No matter the cause/why, that has to stress them out in some way if this goes on. Your thoughts?