Leonardo
 

Animals and monsters (unconnected to known projects)

 

The head of a wolfhound
The head of a dog
Studies of a dog
The head of a snarling lion
Cats, lions, and a dragon
Horses, St George and the Dragon, and a lion
A pelican in piety
Sketches of dragons
An ox
The head of a grotesque animal
Two heads of grotesque animals
Two heads of grotesque animals
The head of a devil
A horse's head
A horse's head
The wolf suckling Romulus and Remus
An ox
A donkey