Views of the National Zoological Park in Washington, DC, showing Przewalski Horse https://www.rawpixel.com/image/9067181/photo-image-art-vintage-public-domainFree Image from public domain licensePrzewalski's Wild Horse (2008) by Jessie Cohen. Original from Smithsonian's National Zoo. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/3061657/free-photo-image-amazing-animal-artFree Image from public domain license