Identification of avian flapping motion from non-volant winged dinosaurs based on modal effective mass analysis

Published on May 2, 2019in PLOS Computational Biology4.428
· DOI :10.1371/journal.pcbi.1006846
Yaser Saffar Talori1
Estimated H-index: 1
(THU: Tsinghua University),
Jing-Shan Zhao1
Estimated H-index: 1
(THU: Tsinghua University)
+ 3 AuthorsJingmai K. O’Connor26
Estimated H-index: 26
(CAS: Chinese Academy of Sciences)
The origin of avian flight is one of the most controversial debates in Paleontology. This paper investigates the wing performance of Caudipteryx, the most basal non-volant dinosaur with pennaceous feathered forelimbs by using modal effective mass theory. From a mechanical standpoint, the forced vibrations excited by hindlimb locomotion stimulate the movement of wings, creating a flapping-like motion in response. This shows that the origin of the avian flight stroke should lie in a completely natural process of active locomotion on the ground. In this regard, flapping in the history of evolution of avian flight should have already occurred when the dinosaurs were equipped with pennaceous remiges and rectrices. The forced vibrations provided the initial training for flapping the feathered wings of theropods similar to Caudipteryx.
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