We, human being, treat an animal as some kind of symbols. Bird as freedom, snake as male.
We can interpret this artwork as a one about the woman in hope of the leaving from a jealous man.
Sometime, one animal has some symbols. Because of the plenty imaginable combination of symbols, it's difficult for us to interpret the right message, and more different to interpret the hidden message.
Some animals enter in a myth or old tale as messanger of god.
Bird introduces words from the heaven to us. Snake gives a wisdom to us.
But god doesn't show the figure at all ...
Animals which we can surely recognize, or god that we can just y image.
Which existence must we respect and fear?
The reason why huuman being prohibit the idolatry may be the consideration toward animals.