Avian obligate brood parasitic lineages evolved variable complex polycrystalline structures to build tougher eggshells

EBSD raw data of eggshells analyzed in this study. Detailed information of the data (e.g. findings, interpretation) are available in the published paper. The attached .ctf files can be opened by a freeware ATEX, which is available in this link (http://www.atex-software.eu/).