Jerry, what probably happened there is the duck suddenly went into a flap, so I tried to change the AF point to a new framing as quickly as the joystick would permit, and lost it in the process.
The next shot is in good focus although there are some other issues with it.
The second shot below is actually the first frame taken in the flap sequence, before I changed to another AF pt. As you can see, the wing has diverted AF away from the duck\'s eye/head .
Needless to say, all this was shot in Servo AF, one preselected AF point.
