If you think language is only present in humans, you may want to watch this video (6 parts). Noam Chomsky is wrong on this issue; plain and simple. But then, he is a linguist and philosopher, not a biologist, so he can be forgiven for thinking that language is unique to humans
http://www.youtube.com/watch?v=SSVF4CuXYno
http://www.youtube.com/watch?v=SSVF4CuXYno