One of the most famous midrashim on Purim discusses the tail that Vashti grew after she was summoned to Achashveirosh. There are animalistic elements of Vashti that are expressed through the growth of a tail, similar to her grandfather Nevuchadnezzar. Nevuchadnezzar was reduced to an animal-like creature when he became too haughty and forgot that Hashem is above the entire world. The snake convinced Chava to eat from the Etz Hadaas with this same idea: the possibility to be on the same level as Hashem, rather than below Him. However, the picture of a true tzelem elokim, someone is the image of G-d who is above animals, is someone who recognizes that Hashem is above him.