The difference between human communications and animal communications
First,in a human's point of view,human language makes more sense.No matter what language it is,it is usual that you can make a rough sense what people are talking about.Human conversations Are more emotional than animal ones,therefore are more convincing.
Secondly,animals tend to use less words than humans.They(mostly)have a limited vocabulary,take mice,for example,their vocabulary is mostly about food and danger.
Thirdly,at least in my point of view,Human communications involves both language and ferocious expressions,animal ones involve noises,actions,and so much more.Animals tend to have a lower intellectual level than humans,so their brain is simpler.