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. 2021 Jul 14;18(180):20210349. doi: 10.1098/rsif.2021.0349

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© 2021 The Authors.

Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 4. — Ventral projections and a transverse slice through each bird. (a–c) (Upper panel) Projected outlines of birds aligned to their body coordinate system. (Lower panel) A transverse section through an individual glide posture with a representative degree of anhedral (within 1° of average). Location of transverse section denoted by the dashed line in the upper panel. (a) T. alba (n = 15 postures); (b) S. aluco (n = 14 postures); (c) A. gentilis (n = 13 postures). (a–c) Scale bars are 40 cm long.