Lion by Jean Bernard (1775-1883). Original from The Rijksmuseum. Digitally enhanced by rawpixel. Free Image from public domain license 
Illustration of Hippopotamus from Zoological lectures delivered at the Royal institution in the years 1806-7 illustrated by… Free Image from public domain license 
Illustration of Crocodile from Zoological lectures delivered at the Royal institution in the years 1806-7 illustrated by… Free Image from public domain license 
A council of state and A fortified village ; Construction of a native Floridian town illustration from Grand voyages (1596)… Free Image from public domain license 
Illustration of Elephant from Zoological lectures delivered at the Royal institution in the years 1806-7 illustrated by… Free Image from public domain license 
Illustration of Single-horned Rhinoceros from Zoological lectures delivered at the Royal institution in the years 1806-7… Free Image from public domain license