@ombialik Bruno Grossi et al. (2014) provide interesting evidence suggesting that #shifting the #centerofmass using an artificial #tail causes #birds to exhibit movements reminiscent of non-avian #theropods (#dinosaurs).

© this text Stefan F. Wirth

Reference: https://doi.org/10.1371/journal.pone.0088458

Fig.
Influence of the additional mass and the experimental tail on #limbposture and #kinematics. Authors: see above; licensed under http://creativecommons.org/licenses/by/4.0/