Language is considered to be a very complex form of communication that occurs among the human race. It is a set of verbal and non-verbal conventions that humans use to express their ideas and wants. Humans use words while talking to express their needs and wants and they cry, slouch and make faces when they want to express feelings. Animals, or in other words non-humans also show signs of communication such as a dog wagging its tail when excited or a bird singing a song to attract the opposite sex. However do animals have their language? Scientists are still unsure about this question.