Heads and feet of five types of falcon, a gos-hawk and a sparrow-hawk. Coloured lithograph by P. Trap. https://www.rawpixel.com/image/13951177/image-cartoon-animal-public-domainFree Image from public domain licensePortrait of Scholar-Official Yun Bonggu (1681-1767) in his Seventieth Year by Byeon Sang byeok https://www.rawpixel.com/image/11922566/image-face-cats-personFree Image from public domain licenseCrater Lake, United States. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3287148/free-photo-image-bird-animal-animals-images-picturesFree Image from public domain license