Muscles and ligaments of the hand: two figures of écorché hands. Lithograph by Martelli after C. Squanquerillo, 1839. https://www.rawpixel.com/image/14018484/image-paper-horse-handFree Image from public domain license
A loaded mule, seen from behind, walking in a mountainous landscape. Etching by J. E. Ridinger. https://www.rawpixel.com/image/13957598/image-paper-horse-cartoonFree Image from public domain license
Shaheen falcon collage element illustration vector. Free public domain CC0 image. https://www.rawpixel.com/image/7569510/vector-public-domain-bird-illustrationsFree Vector from public domain license
Two tigers in a mountainous landscape, one is devouring its prey while the other one is resting on a rock. Etching by J. E.… https://www.rawpixel.com/image/13981804/image-cartoon-tigers-artFree Image from public domain license
Trient (Valais). Interieur de la Gorge de Trient. by Adolphe Braun https://www.rawpixel.com/image/14291390/trient-valais-interieur-gorge-trient-adolphe-braunFree Image from public domain license
Looks good to eat , but not. Original public domain image from Wikimedia Commons https://www.rawpixel.com/image/3372175/free-photo-image-animal-cc0-crawdadFree Image from public domain license
Ruins of Chelsea Fire, Massachusetts, $12,000,000 Fire by D J Lindsay https://www.rawpixel.com/image/14302366/ruins-chelsea-fire-massachusetts-dollar12000000-fire-lindsayFree Image from public domain license
Gevechtsscène, illustratie van de Razm Nama (1616) by anonymous https://www.rawpixel.com/image/13795463/gevechtsscene-illustratie-van-razm-nama-1616-anonymousFree Image from public domain license
Ducklings at Neosho National Fish HatcheryPhoto by Bruce Hallman/USFWS. Original public domain image from Flickr https://www.rawpixel.com/image/4029206/photo-image-plant-person-babyFree Image from public domain license
A fox about to fall into a pit-trap disguised with shrubwood. Etching by J.E. Ridinger. https://www.rawpixel.com/image/14016923/image-paper-cat-cartoonFree Image from public domain license
Phaeton with a Pair of Cream Ponies and a Stable–Lad (1780–1784) painting in high resolution by George Stubbs.… https://www.rawpixel.com/image/3819791/illustration-image-tree-art-botanicalFree Image from public domain license
Great spotted woodpecker, bird photography. Free public domain CC0 image. https://www.rawpixel.com/image/6036879/photo-image-public-domain-tree-natureFree Image from public domain license
A fungus (Agaricus cerussatus): three fruiting bodies. Watercolour, 1865. https://www.rawpixel.com/image/13952158/fungus-agaricus-cerussatus-three-fruiting-bodies-watercolour-1865Free Image from public domain license
Seville - Bridge over the Guadalquiver. by Frank Mason Good https://www.rawpixel.com/image/14292426/seville-bridge-over-the-guadalquiver-frank-mason-goodFree Image from public domain license
Harlem. Interieur de la grande eglise (St.-Bavon). by Adolphe Braun https://www.rawpixel.com/image/14289056/harlem-interieur-grande-eglise-st-bavon-adolphe-braunFree Image from public domain license
White-clawed crayfish collage element illustration vector. Free public domain CC0 image. https://www.rawpixel.com/image/7568254/vector-public-domain-illustrations-orangeFree Vector from public domain license
Joe Purcell of the Purcell Ranch near Lolo, Mont., has marked areas of his ranch burned by wildfire. Missoula County… https://www.rawpixel.com/image/3335139/free-photo-image-abies-animal-birdFree Image from public domain license
Lark sparrowWhite, brown, and black bird perched in a tree Credit NPS/Andy Bridges. Original public domain image from Flickr https://www.rawpixel.com/image/4033548/photo-image-bird-animalFree Image from public domain license
Études sur la maladie des vers à soie : moyen pratique assuré de la combattre et d'en prévenir le retour / par L. Pasteur. https://www.rawpixel.com/image/13987731/image-plant-tree-artFree Image from public domain license
[Five cows, looking out at the viewer, standing in a field with a house behind them] https://www.rawpixel.com/image/7689066/image-art-vintage-public-domainFree Image from public domain license
A pair of goldfinches in a treePhoto by Courtney Celley/USFWS. Original public domain image from Flickr https://www.rawpixel.com/image/4028963/photo-image-tree-plant-leafFree Image from public domain license
Northern Water SnakeNorthern water snake at the Horseshoe Bend unit of Port Louisa National Wildlife Refuge in Iowa.Photo by… https://www.rawpixel.com/image/4029060/photo-image-nature-water-snakeFree Image from public domain license
Red bird perching on branch. Original public domain image from Flickr https://www.rawpixel.com/image/4030071/cardinal-john-heinz-national-wildlife-refugeFree Image from public domain license
Two plants, one possibly of the Labiatae family: flowering stems with pink and yellow flowers. Watercolour. https://www.rawpixel.com/image/13967139/image-flower-plant-artFree Image from public domain license