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. 2020 Oct 2;11:4970. doi: 10.1038/s41467-020-18772-3

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 4 — a Reconstruction of the evolutionary rates for drumming acoustic structure (‘PC1’) and normalized MI_L along the woodpeckers’ phylogeny (n = 92 species). Both trees are based on relaxed-rates Brownian motion evolutionary models. Average posterior rates have been standardized (dividing variables by their respective standard deviation before model computation) and are represented by a colour-gradient (scales indicated in the Figure). These gradients do not indicate an increase or decrease of the absolute trait values, but rather whether the rate of change (i.e. the diversification speed) of a trait increases or decreases. b Correlations between evolutionary rates of acoustic structure (represented by PC1) and MI_L. Rates were log-transformed; for acoustic structure represented by PC2-PC6, see Supplementary Fig 10. Source data are provided as a Source data file.