The serpent has been one of the oldest mythological symbols in various cultures in the world. Serpents have had many representations in different cultures, signifying both good and evil. Some consider it to represent creation, power, and birth, but some also consider it to represent protection, poison, healing, revenge, and even Satan.
The difference is when you draw by memory you won't remember every tiny detail, and you make/draw it in your own way vs. having the object in front of you you can copy it almost exactly.
