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Owls 270 ° as far as their heads and necks rotate enable the seven, their necks flexible than the vertebrae Owls 14 neck that their transmission system adaptation, the brain's blood without cutting rotation allowed: the vertebrae, the spinal cord vessels pass into the bone Instead of the same size of the artery, approximately 10 times the diameter of the artery is in humans;
(source)(https://pixabay.com/en/owl-bird-feather-eagle-owl-animals-3340957/)