Black-throated Divers (1901) painting in high resolution by Bruno Liljefors. Original from The Thiel Gallery. https://www.rawpixel.com/image/7724680/image-art-public-domain-natureFree Image from public domain licenseBlack-Throated Diver from Birds of America (1827) by John James Audubon, etched by William Home Lizars. Original from… https://www.rawpixel.com/image/277173/free-illustration-image-audubon-birds-america-public-domain-loonFree Image from public domain license