American robinAn American robin along a wetland.Photo by Courtney Celley/USFWS. Original public domain image from Flickr https://www.rawpixel.com/image/4028237/photo-image-plant-bird-natureFree Image from public domain licenseA variety of shells, cone-shells, fossils and corals. Coloured lithograph. https://www.rawpixel.com/image/13963531/variety-shells-cone-shells-fossils-and-corals-coloured-lithographFree Image from public domain licenseGreen HeronPhoto by Grayson Smith/USFWS. Original public domain image from Flickr https://www.rawpixel.com/image/4028854/photo-image-plant-bird-natureFree Image from public domain licenseChilean flamingo (Phoenicopterus chilensis). It breeds in South America from Ecuador and Peru to Chile and Argentina and… https://www.rawpixel.com/image/4021243/photo-image-tropical-bird-natureFree Image from public domain licenseCedar waxwing in flowering crab tree, in Bozeman, MT, December 2006. Public Domain. Original public domain image from Flickr https://www.rawpixel.com/image/3335663/free-photo-image-animal-bird-blue-jayFree Image from public domain licenseThe 8th Brigade Engineer Battalion conducted a Demolition Range on July 9, 2017. Original public domain image from Flickr https://www.rawpixel.com/image/4044177/photo-image-animal-public-domainFree Image from public domain license130430-022 SpringNEW LONDON, Conn. -- Trees and flowers bloom on the U.S. Coast Guard Academy campus April 30, 2013. U.S.… https://www.rawpixel.com/image/5976933/photo-image-public-domain-dog-birdFree Image from public domain licenseWild Burro in Lee CanyonA wild burro in Lee Canyon, Spring Mountain National Recreation Area Highway, Humboldt Toiyabe… https://www.rawpixel.com/image/4034987/photo-image-tree-plant-personFree Image from public domain licenseAmerican goldfinchPhoto by Courtney Celley/USFWS. Original public domain image from Flickr https://www.rawpixel.com/image/4029004/photo-image-bird-nature-waterFree Image from public domain licenseMonarch butterfly sipping nectar from alfalfaPhoto by Courtney Celley/USFWS. Original public domain image from Flickr https://www.rawpixel.com/image/4028819/photo-image-flower-plant-beeFree Image from public domain licenseTrotting stallion Nelson, by Young Rolfe: record 2:14 14m (1889) by Currier & Ives. https://www.rawpixel.com/image/8667340/image-art-vintage-public-domainFree Image from public domain license