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https://www.youtube.com/watch?v=OT8WWw6ViBE
A slightly less lethal example:
https://www.youtube.com/watch?v=_dPlkFPowCc
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And their head is like its on a gimbal, it stays completely still relative to their prey even when their wings and tail are moving.
If you ever see one on a falconers glove when they're focused on something and the falconer moves his arm around, the head stays in the same spot.
Mate, of course he knows this. You're talking to a owl.
Kestrels do this whilst hovering impressively