Well it would seem that my closes neighbours on the floor, or at least the ones who's door is right next to ours, also have at least one bird. When I got home yesterday I kept hearing some bird noises from that apartment whenever I was in the hallway or close to our door. This is the first time I ever noticed it..
The worst part in all of it? The Boy said he noticed it a few months ago..guess I always figured it was our birds who were making the noise!