After having worked for few hours from home, I opened the main door of my house just to watch outside (usual habit). It was a sunny day, of course and the surrounding was silent. Spotted this pigeon walking on the road. Kept looking at it for sometime and it started flying back and forth from attic of that house to road. I was not sure of filming it really. But that repeated flights made me rush into my house. I grabbed the camera and batteries, inserted those batteries while running back and could capture this somehow.
Video is shaky in between, but thats the best I could do for that moment. And the house where the nest is being built is actually vacant :-)