About a month ago, I started to awake to noises that sound like wires being dragged along a wall (you know, like when you have cables dangling behind a desk and you’re adjusting them).  A few days of that and we began to wonder if it was the neighbors getting up early each day and moving things around.  However, one day it became distinctive scratching.  So I posited that it was rats in the wall.  Which seemed to all make sense as the noise continued, until THIS happened:

And that is how we came to learn that it was actually birds.  I suppose they were building a nest and then when their young hatched, they started to chirp.  So a good two weeks of this goes by and we had enough.  Time to move the bed.  The next morning, peace.  Then the day after that, I heard them again.  Less loud, but still there.  Maintenance had been informed, but I guess they hadn’t gotten a chance to extract the nest.  It got really annoying being woken up (usually around 7) by these noises, which included chirping, scratching, and even the thud when the birds flew in from the entrance of the air vent.