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. 2017 Jul 26;284(1859):20170876. doi: 10.1098/rspb.2017.0876

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© 2017 The Author(s)

Published by the Royal Society. All rights reserved.

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Figure 2. — (a) Principal Component Analysis of pooled postcranial measurements of modern (Australia) and prehistoric (NZ/CI) Cygnus swans. (b) A Simpson's log-ratio diagram, showing the logarithmic differences of mean lengths of the postcranial elements of prehistoric Cygnus from the CI (proxy for NZ cf. Corvus spp.; [46]) relative to the modern (Australia) Cygnus. Abbreviations: COR, coracoid; HUM, humerus; ULN, ulna; CMC, carpometacarpus; FEM, femur, TBT, tibiotarsus; TMT, tarsometatarsus. (c) Relationship between mean body mass (in kg) and tibiotarsus circumference in anatids. Data are from Dickison [44]. (Online version in colour.)