To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie 1 Helmeted guineafowl hip poses transformed from Euler space to cosine-corrected Euler space. Alpha shape colors correspond to those in Figure 3. A coordinate-system-independent method for comparing joint rotational mobilities Armita R. Manafzadeh, and Stephen M. Gatesy Journal of Experimental Biology 2020. 223:None-None; doi: 10.1242/jeb.227108 Download Original Video