This public domain snake drawing is the first in what will hopefully be a large collection of snake images. In this drawing, the snake’s scales are beautifully drawn. His forked tongue is out and is apparently sniffing the ground.
The snake drawing is done in black and white and could easily be colorized to match your project. In 1921, children all over the world were enjoying The Peacock and the Wishing Fairy and all of the wonderful illustrations it contained from Dugald Stewart Walker (1883-1937).
This image is copyright free and in the public domain anywhere that extends copyrights 70 years after death or at least 120 years after publication when the original illustrator is unknown.