https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/277513Edit ImageSaveSaveEditCropCustom TextBlue-green Warbler from Birds of America (1827) by John James Audubon, etched by William Home Lizars. Original from University of Pittsburg. Digitally enhanced by rawpixel.MorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGTIFFSmall JPEG 775 x 1200 px | 300 dpiLarge JPEG 1615 x 2500 px | 300 dpiTIFF 1615 x 2500 px | 300 dpi | 11.58 MBFree DownloadBlue-green Warbler from Birds of America (1827) by John James Audubon, etched by William Home Lizars. Original from University of Pittsburg. Digitally enhanced by rawpixel.More