Genesis 3:14

So the Lord God said to the serpent, "Because you have done this, cursed are you above all the livestock and all the wild animals!  You will crawl on your belly and you will eat dust all the days of your life."  Genesis 3:14

Now that both man and woman have had a chance to give their side of the story, God turns to the snake, but he doesn't ask the serpent for it's side.  Why not? 

Instead God gives the snake his edict for deceiving the woman.  Now it would crawl on his belly.  Did it not before?  Did the snake have legs?  Also could all the animals talk?  Or was it just this serpent?  Did the devil come take the form of a serpent?  If so, why curse all snakes if it was actually Satan?