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. 2016 Mar 2;11(3):e0149236. doi: 10.1371/journal.pone.0149236

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© 2016 Weger, Wagner

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig 12 — (A) Plotted are the mean values and standard deviations of these 25 measurements. The inset in (A) shows how the length of the serrations was measured. The color of the bars depicts the position at the feather. (B) Statistical comparison. The data base is the same as in Fig 10, and the measurement results for the serration length of all investigated owl species were compared using the Monte Carlo method in the same way as the inclination angles (see legend to Fig 10). Note that serration length seems to be determined by a mixture of size and activity pattern, with no clear separation according to either of the two.