Thanks for the info Ikkal. I am not conversant with the Pentax K-5 so can only generalise.
97.5 mm on a 1.5 crop gives a 35mm equivalent of 146.25 mm. Ideally you need a FL of 250 mm, or more if possible for this type of shot, so as I said, you need to be closer.
F/13 aperture is too small, you can comfortably open as wide as possible, that will depend on the lens you are using, but f/5.6 is common for BIF. This will reduce your DoF but that is acceptable at this range and for BiF shots.
I think you can select your AF point on your Pentax, so if possible, select the single centre point and aim that at the bird as you track it.
Your shutter speed is far too slow for this type of shot, for BIF I usually try to use in excess of 1/1000, but 1/1500 if I can. Opening the aperture up will help achieve this, and increase your ISO to give you more speed.
All being well, someone who knows your camera in more detail will be able to advise you more.
I hope this helps
Trev