https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13995915Edit ImageSaveSaveEditCropCustom TextSkull bones of birds: ten figures. Lithograph by J. Erxleben, after C.W. Parker, 1840/1860.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 713 px | 300 dpiLarge JPEG 3434 x 2041 px | 300 dpiFree DownloadSkull bones of birds: ten figures. Lithograph by J. Erxleben, after C.W. Parker, 1840/1860.More