Black-throated magpie-jay (Pica colliei) illustrated by Charles Dessalines D' Orbigny (1806-1876). Digitally enhanced from… Free Image from public domain license 
American Crow from Birds of America (1827) by John James Audubon, etched by William Home Lizars. Original from University of… Free Image from public domain license 
Sidney Hall’s (1831) astronomical chart illustration of the Monoceros, Canis Minor and the Atelier Typographique.… Free Image from public domain license 
Antique fish Wrasse drawn by Fe. Clarke (1849-1899). Original from Museum of New Zealand. Digitally enhanced by rawpixel. Free Image from public domain license 
Maranta arundinacea illustration from Les liliacées (1805) by Pierre-Joseph Redouté. Original from New York… Free Image from public domain license 
Great Barrier Reef Fishes from The Great Barrier Reef of Australia (1893) by William Saville-Kent (1845-1908). Digitally… Free Image from public domain license 
Great Barrier Reef Fishes from The Great Barrier Reef of Australia (1893) by William Saville-Kent (1845-1908). Digitally… Free Image from public domain license 
Emperor bird-of-paradise, male from Histoire Naturelle des Oiseaux de Paradis et Des Rolliers (1806) by Jacques Barraband… Free Image from public domain license 
Pleomele illustration from Les liliacées (1805) by Pierre-Joseph Redouté. Original from New York Public… Free Image from public domain license 
Bird of paradise illustration from Les liliacées (1805) by Pierre-Joseph Redouté. Original from New York Public… Free Image from public domain license 
Painted Finch from Birds of America (1827) by John James Audubon, etched by William Home Lizars. Original from University of… Free Image from public domain license 
Ground Dove from Birds of America (1827) by John James Audubon, etched by William Home Lizars. Original from University of… Free Image from public domain license 
Bird of paradise (Strelitzia Reginae) illustrated by Charles Dessalines D' Orbigny (1806-1876). Digitally enhanced from our… Free Image from public domain license 
Vintage illustration of Architecture in Piccadilly published in 1870 by Arthur Cates (1829-1901). Original from New York… Free Image from public domain license 
German iris illustration from Les liliacées (1805) by Pierre-Joseph Redouté. Original from New York Public… Free Image from public domain license 