There is no doubt that we are animals, we act like animals in a number of ways, we are just as much a mammal as a chimp or a rabbit or even a whale.
A thing that a lot of you have said though is that we are a better class of animal. I don't believe this. It is debatable that we are more intelligent. I'd say it's very wrong and very ignorant to suggest that we have evolved most or best though. Some animals, such as spiders were here a long time before us and they'll probably outlive us. If anything I would suggest that our ability to .... I don't even know what word to use. Our ability to process thought is different to animals and the ability to have complex emotions are weaknesses of ours. You'll never see wolves going to war with each other, and animals can survive against all the elements without the use of invention.
We are a dying race, and our dominance of the world is subjective. We toy with nature and because of this we do ourselves no favours. We will die out long before many many animals.
Morbidity over.
Edit: this whole argument of language is immaterial. Language is a term invented by us but our means of communicating are not better then any other animal, we use far to many words to describe completely unneccessary things, something that animals are not limited by, animals have no need for formality, we have developed unneccesary ideas. An animal can communicate about food, shelter, sex, and other such important things and live a simple and productive life. Ours lives are very complex and unproductive.