Human beings are the only species to trade that I am aware of with our form of living being dictated by a social constructed science known as economics.
While other animals do exchanges amongst each other for pleasure this seems to be more of a barter which I assure you is much more different then that of the subject known as trade.
It is interesting to note that what most people think to be the foundation of natural human advances and progression is nothing but an extension of this synthetic system being in all actuality a prosthetic itself.
Even more interesting is that this social science called economics is guided by morality another insidious synthetic device.