Northern River Otter (Lontra canadensis). Original public domain image from Flickr https://www.rawpixel.com/image/3311268/free-photo-image-animal-aquatic-bogFree Image from public domain licenseNorth American River Otter (2014) by Abby Wood. Original from Smithsonian's National Zoo. Digitally enhanced by rawpixel. https://www.rawpixel.com/image/3060037/free-photo-image-otter-zoo-animals-beaverFree Image from public domain license