I found your pictures almost by hazard searching for birds pictures. I started taking pictures of birds in Stockholm last year, and when I see your pictures, I feel I remenber that time.
On this picture I can see the window where I lived a year ! And I guess it's right on the middle of Kungsholmen, I lived in Svarvargatan 1.
Check on this small rocky hill my friend, every morning in the winter, they were at list 3 or 4 different sparrowhawks and 1 or 2 goshawks hunting pigeons and smaller birds (scenes that I could see from my window (on your picture !) having my breakfast every morning (with my binocular). I got good pictures from sparrowhawks, to get pictures from them, this is the spot, so go ahead and good luck !