That's a lot of tiny bones in what looks like a pretty short neck (at least from the outside). Also interesting how the blood flow works. You mentioned a little bit about that before, so I got curious and found this:
Also, it has recently been discovered that in the owl neck, one of the major arteries feeding the brain passes through bony holes in the vertebrae. These hollow cavities are approximately 10 times larger in diameter than the vertebral artery travelling through it. The extra space ... creates a set of cushioning air pockets that allow the artery to move around when twisted.
Blood vessels at the base of the head, just under the jaw bone, can also act as contractile blood reservoirs, allowing owls to pool blood to meet the energy needs of their large brains and eyes, while they rotate their heads.
Beautiful. That's an impressive wingspan.