Birds

Over a month ago, Peter and I were woken up, on a Saturday morning at 6am, to what we thought was a soft pounding hammer. We tried to sleep through it but it was very obnoxious. We live in a corner apartment on the second floor, so when we discovered the sound was coming from a wall that had no neighbor, we knew it had to be a bird. Peter spent the next few days trying to scare it away by throwing rocks at it. He never hit it, don't worry. It did eventually fly further North for the Summer (I'm guessing). About a week after the pounding stopped,  we heard some rustling/scratching noises from that same neighbor-less bathroom wall. We figured it was either another bird or a squirrel but it was soft and could only be heard in the bathroom. The rustling continued on until last Monday when we came home after the weekend to hear about 3 baby birds chirping very loudly (and at a high pitch!). They do quiet down at night and I wake up before them so its only between 5pm and 9pm that they are really annoying. I'm not sure how long they will take to leave the nest but, whenever I walk into the bathroom the floor creaks and they go bananas!