Warm Wood Hare (Lepus artemesia) from the viviparous quadrupeds of North America (1845) illustrated by John Woodhouse Audubon… Free Image from public domain license 
American Cross-Fox (Canis vulpes) from the viviparous quadrupeds of North America (1845) illustrated by John Woodhouse… Free Image from public domain license 
Virginian Opossum (Didelphis Virginiana) from the viviparous quadrupeds of North America (1845) illustrated by John Woodhouse… Free Image from public domain license 
Collection of various birds from A history of the earth and animated nature (1820) by Oliver Goldsmith (1730-1774). Digitally… Free Image from public domain license 
Collection of various birds from A history of the earth and animated nature (1820) by Oliver Goldsmith (1730-1774). Digitally… Free Image from public domain license 
Foxglove (Digitalis purpurea) illustration from Medical Botany (1836) by John Stephenson and James Morss Churchill. Free Image from public domain license 
Northern Hare (Lepus Americanus) from the viviparous quadrupeds of North America (1845) illustrated by John Woodhouse Audubon… Free Image from public domain license 
Elk by Kōno Bairei (1844-1895). Digitally enhanced from our own original 1913 edition of Barei Gakan. Free Image from public domain license 
Design for Herbarium book cover by Julie de Graag (1877-1924). Original from The Rijksmuseum. Digitally enhanced by rawpixel. Free Image from public domain license 
Dripping mushroom (1916) by Julie de Graag (1877-1924). Original from The Rijksmuseum. Digitally enhanced by rawpixel. Free Image from public domain license 
Trellis by William Morris (1834-1896). Original from The MET Museum. Digitally enhanced by rawpixel. Free Image from public domain license