Brown Bear (Ursus Arctos) illustrated by Charles Dessalines D' Orbigny (1806-1876). Digitally enhanced from our own 1892… Free Image from public domain license 
The ukiyo-e illustration, Camellia and Nightingale by Utagawa Hiroshige, also known as Ando Hiroshige (1797-1858), a… Free Image from public domain license 
Blooming azalea in blue pot (1920 - 1930) by Ohara Koson (1877-1945). Original from The Rijksmuseum. Digitally enhanced by… Free Image from public domain license 
Three Birds Perched on Branches, One with Blossoms by Katsushika Hokusai, published between 1830 and 1850, an illustration of… Free Image from public domain license 
Blooming lotus flowers (1920 - 1930) by Ohara Koson (1877-1945). Original from The Rijksmuseum. Digitally enhanced by… Free Image from public domain license 
Iris flowers (1925 - 1936) by Ohara Koson (1877-1945). Original from The Rijksmuseum. Digitally enhanced by rawpixel. Free Image from public domain license 
Traditional illustration lithograph of kimono design, three colorful birds in a black background. Digitally enhanced from our… Free Image from public domain license 
Birds and plants (1900 - 1936) by Ohara Koson (1877-1945). Original from The Rijksmuseum. Digitally enhanced by rawpixel. Free Image from public domain license 
Water Lily (1920 - 1930) by Ohara Koson (1877-1945). Original from The Rijksmuseum. Digitally enhanced by rawpixel. Free Image from public domain license