The neck of the barn owl.

<p>A) Cadaver of a barn owl in a left lateral view with the head on the left hand side. The plumage and skin of head and neck are removed. B) An X-ray picture of the neck of a living owl. One cervical vertebra is marked by a red arrow. The inset (vert = vertical; horiz = horizontal) indicates that the owl is sitting in an upright position. C) The same situation as in A) after rotating the head by 180°. Note that in the photograph in C) the corpus of the owl is rotated by 90 degrees about the vertical axis compared with the photograph in A). Note the S-shaped form and the contribution of all three regions to the rotation.