When taking photos of birds, you need to remember that regardless of their breed, they have the eyes of a hawk. The slightest movement or sound will scare them off, theres no changing that, thats just how they are.
As suggested before, a shed would work just find, it would not let as much sound out so you can easily take photos and maybe slurp some tea in there while your at it. Another option is camoflauge. Your gonna need some camo gear and one of those sheets of netting that are used in army bases. Try not to move, also it would help if you got a remote capture device. Like, you press a button and you camera takes a photo. Less noise, less movement, better results.
Hope this helped.
Regards
Orbit.