According to some evolutionary theorists man is nothing special, and so, even though to be classed as an animal, man is not to be considered higher than any other.
According to the Bible, man is the pinnacle and completion of God's creation. Man was created on the same day as the animals, but is not himself an animal, since man alone is made in the image of God. Man alone is held accountable to God and man alone knows true guilt and has a soul and self-awareness which animals do not have. Animals also do not discuss who, if anyone, is the highest, although they certainly do fight for dominance.