Horse Shoe Fall from Canada [Niagara Falls, N.Y.] by George E Curtis https://www.rawpixel.com/image/14290812/horse-shoe-fall-from-canada-niagara-falls-ny-george-curtisFree Image from public domain licenseMonarch Caterpillar on Common MilkweedWe spotted this large monarch caterpillar munching on a common milkweed leaf. Soon, it… https://www.rawpixel.com/image/4028448/photo-image-plant-summer-natureFree Image from public domain licenseEastern Gray Treefrog at Horicon National Wildlife RefugePhoto by Rachel Samerdyke/USFWS. Original public domain image from… https://www.rawpixel.com/image/4029087/photo-image-plant-leaf-birdFree Image from public domain licenseTwo men by horse & donkey-drawn wagon near a river, bridge in background https://www.rawpixel.com/image/14310738/two-men-horse-donkey-drawn-wagon-near-river-bridge-backgroundFree Image from public domain licenseA lion and lioness with cubs. Engraving by G Duwe after J Graham. https://www.rawpixel.com/image/13981345/lion-and-lioness-with-cubs-engraving-duwe-after-grahamFree Image from public domain license​Pollinating — Here we see a ​hoverfly fly (aka - syrphid fly or flower fly) landing on a flower at a local nursery to… https://www.rawpixel.com/image/4043617/photo-image-plant-beeFree Image from public domain licenseYoung Moose taking an early morning drink from Palisades Creek just below Upper Palisades Lake, Palisades Ranger District… https://www.rawpixel.com/image/4034851/photo-image-tree-plant-leafFree Image from public domain licenseBlack-throated sparrowSparrow with a distinct black throat and white lines extending from the top and bottom of its bill… https://www.rawpixel.com/image/4033920/photo-image-plant-birdFree Image from public domain licenseFree shiba inu dog standing on snow image, public domain animal CC0 photo. https://www.rawpixel.com/image/5923562/photo-image-background-public-domain-dogFree Image from public domain licenseA flowering tree branch with a separate germinating seed. Watercolour. https://www.rawpixel.com/image/13959460/flowering-tree-branch-with-separate-germinating-seed-watercolourFree Image from public domain license[A clown wearing colorful costume and mask, with wild hair and hat with animal on top, and holding a rattle]. Original from… https://www.rawpixel.com/image/7636699/image-art-vintage-public-domainFree Image from public domain licenseBlack BearWe spotted this female black bear crossing a field in northern Minnesota.Photo by Courtney Celley/USFWS. Original… https://www.rawpixel.com/image/4028858/photo-image-summer-natureFree Image from public domain licensePlate XXV. External view of the pharynx with its muscles. https://www.rawpixel.com/image/13975476/plate-xxv-external-view-the-pharynx-with-its-musclesFree Image from public domain licenseOld and New Tabernacle, Salt Lake, Utah. by Charles Bierstadt https://www.rawpixel.com/image/14288756/old-and-new-tabernacle-salt-lake-utah-charles-bierstadtFree Image from public domain licenseCat sitting and staring at camera portrait. Original public domain image from Flickr https://www.rawpixel.com/image/4026568/original-public-domain-image-from-flickrView licenseA wild boar resting under a tree in the forest. Etching by J. E. Ridinger. https://www.rawpixel.com/image/14003791/wild-boar-resting-under-tree-the-forest-etching-ridingerFree Image from public domain licenseStereoscopic Studies in the Nooks and Corners of Old England. [Cows in pasture] by William Grundy https://www.rawpixel.com/image/14291685/photo-image-cow-camel-animalFree Image from public domain licenseMilbert's Tortoiseshell - Aglais milberti. Original public domain image from Flickr https://www.rawpixel.com/image/3309992/free-photo-image-butterfly-moth-animalFree Image from public domain licenseRuins of Mission Purisima Concepcion by Louis Fleckenstein https://www.rawpixel.com/image/14283236/ruins-mission-purisima-concepcion-louis-fleckensteinFree Image from public domain licenseWhite-throated sparrowWhite-throated sparrow at Morris Wetland Management District. Photo by Alex Galt/USFWS. Original… https://www.rawpixel.com/image/4029130/photo-image-bird-animalFree Image from public domain licenseDragonfly's face closeup, insect background. Free public domain CC0 photo. https://www.rawpixel.com/image/6026001/photo-image-background-face-public-domainFree Image from public domain licenseGrizzly sow nursing cubs near Fishing Bridge by Jim Peaco. Original public domain image from Flickr https://www.rawpixel.com/image/4038742/photo-image-plant-lionFree Image from public domain license