Eggshell colour differences in a classic example of coevolved eggshell mimicry

To replicate our results, you will need the attached R code (Villa\_etal\_2023.R) and the reflectance spectra data for the parasitized warbler nests previously published by Honza et al. 2014 (Reflectance data\_matching2013\_Suppl.csv). A complete version of the original data can be found in the supplemental material by Honza, M., Šulc, M., Jelínek, V., Požgayová, M., & Procházka, P. (2014). Brood parasites lay eggs matching the appearance of host clutches. Proceedings of the Royal Society B: Biological Sciences, 281(1774), 20132665. **Contents:** * ***Electronic supplementary material*** File name: esm\_Villa\_etal\_2023.doc * ***Analysis of egg colour information in R*** File name: Villa\_etal2023.R Structure: 0\. libraries 1\. functions 2\. data preparation 3\. visual model 4\. circular analysis 5\. supplementary analysis * ***Parasitized great reed warblers by cuckoos, published by Honza et al. 2014*** File name: spectra\_Honza\_etal\_2014.csv Column A: 'wl' : wavelength from 300 to 700 nm Column B to AM: reflectance values for 38 eggs (19 pairs) measured by Honza et al. 2014. Reflectance spectra of *Acrocephalus arundinaceus* eggs are indicated as 'Aa' and *Cuculus canorus* eggs as c1