La Giraffe (1837) by Florent Prevos (1794-1870), an illustration of an adorable giraffe. Digitally enhanced from our own… Free Image from public domain license 
Couple of deers (1900 - 1930) by Ohara Koson (1877-1945). Original from The Rijksmuseum. Digitally enhanced by rawpixel. Free Image from public domain license 
Sea turtle, Cheloniidae (1596–1610) by Anselmus Boëtius de Boodt. Original from the Rijksmuseum. Digitally… Free Image from public domain license 
Skull of a cow (1816) by Jean Bernard (1775-1883). Original from the Rijks Museum. Digitally enhanced by rawpixel. Free Image from public domain license 
Jaguar (Panthera Onca) illustrated by Charles Dessalines D' Orbigny (1806-1876). Digitally enhanced from our own 1892 edition… Free Image from public domain license 
Asiatic elephant (Elephas maximus) indicus illustrated by Charles Dessalines D' Orbigny (1806-1876). Digitally enhanced from… Free Image from public domain license 
Collection of animals in the feline family from A history of the earth and animated nature (1820) by Oliver Goldsmith (1730… Free Image from public domain license 
Sitting Cat (1918) by Julie de Graag (1877-1924). Original from The Rijksmuseum . Digitally enhanced by rawpixel. Free Image from public domain license 
Head of a calico cat with open eyes (1819) by Jean Bernard (1775-1883). Original from The Rijksmuseum. Digitally enhanced by… Free Image from public domain license 
Rolled up lying sleeping cat (1825) by Jean Bernard (1775-1883). Original from The Rijksmuseum. Digitally enhanced by… Free Image from public domain license 
Sketch of a cat (1813) by Jean Bernard (1775-1883). Original from The Rijksmuseum. Digitally enhanced by rawpixel. Free Image from public domain license 
Beautiful Cat (Felis ornata) from Illustrations of Indian zoology (1830-1834) by John Edward Gray (1800-1875). Original from… Free Image from public domain license 
Great geese in flight (1925 - 1936) by Ohara Koson (1877-1945). Original from The Rijksmuseum. Digitally enhanced by… Free Image from public domain license 
Carp or Koi (1926) by Ohara Koson. Original from the Los Angeles County Museum of Art. Digitally enhanced by rawpixel. 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 
Roaring tiger (1900 - 1945) by Ohara Koson (1877-1945). Original from The Rijksmuseum. Digitally enhanced by rawpixel. Free Image from public domain license