https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14000390Edit ImageSaveSaveEditCropCustom TextBones of three species of bird: tinamus, sand grouse and partridge . Lithograph by J. Erxleben, 1840/1860.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 734 px | 300 dpiLarge JPEG 3487 x 2133 px | 300 dpiFree DownloadBones of three species of bird: tinamus, sand grouse and partridge . Lithograph by J. Erxleben, 1840/1860.More