wryneck

Short definition from Wiktionary

Noun

1. 1
   Either of two small woodpeckers, Jynx torquilla and Jynx ruficollis, of the Old World, that turn their heads almost 180 degrees when foraging.
2. 2
   A twisted or distorted neck; a deformity in which the neck is drawn to one side by a rigid contraction of one of the muscles.