I came in search of the bird, too!
Melania, the crane height forced you to tilt your camera a bit to the sky to put it in the frame. This caused a perspective distortion on your image. You can easily correct this with PP techniques. For instance, PS can do it under "Filter/Lens correction" menu. Composition wise, I think you could have added more space around the crane. I feel it is a bit too tight in the frame. Specially when shooting architecture, it is important to have some space for the perspective distortion corrections. This is just my humble opinion.
Below is a quick perspective correction edit just to show it what I meant about the perspective. I needed to add some canvas to do this. Hope you dont mind me posting this edit. If that bothers you, just let me know and I will remove it promptly.
My quick edit
Hope that is of any help.