I looked at the exif data and the bird shot is

800mm, ISO 400, F/11, shutter speed 30th sec

I am going to guess that your lens is having a very tough time trying to auto focus as most lens cant over F/5.6 with the extenders on. Also unless you were shooting off a tripod a 30th of a sec is way to slow for that focal length should be closer to 800th of a sec to reduce camera shake. Your auto focus mode should be on one shot as the camera is haivng a hard time trying to focus with that lens. When shooting wildlife you can turn off redeye also as all those preflashs will do it potentially scare your subject.

Try this and see how it works for you

1.set the camera to Tv (shutter priority) set the shutter speed to atleast a 600th of a sec on a monopod.
2.usless its a very sunny day you are most likely going to have to push the ISO up to 800 or higher to get proper exposure

3. set focus to one shot us AF, but be prepared to MF.

Hope this helps