Humans too.

I have watched seagulls commuting at midnight in downtown Halifax, NS, it was a double take moment.....

I've witnessed this since more than a decade ago, in western parts of Hamburg, Germany.

Even when there is almost no traffic, in the deepest parts of night, there are birds singing. Sometimes more, sometimes less.

Furthermore, some are imitating technologic sounds, like ringtones of phones, toys like laser pistol sci-fi sounds, or acoustic signalings of scooters turning, delivery/utility trucks beeping while going backwards, alarms, and so on.

Making you think WTF!? when you're out there, on some path in the fields, where there is no such stuff, or from above you, in the trees on the side, and in the middle of the streets.

OFC nobody believing that, because the Hamburger Schnarchnasen don't experience that in their daily lifes, due to working schedules, or not being in places where one could notice that, while awake at night.