The bird outside the office

Can you see a bird outside the window?

I heard a bird singing while I was at work this afternoon. Our office is at the 10/F, so very often we can see birds flying beside us outside the window. At first, I thought the bird would fly away soon. However, it kept singing for a while, so I stood up and looked out the window -- oh, there you were!

So I took up my mobile, turned it on and took this picture. I tried to zoom in more but by that time the bird was gone.

The bird sang for longer than a minute. Nice music in the middle of a boring afternoon.