It was a joke, in case you didn't catch it. In fact all you can reasonably define is survive-ability of a typical organism of a species to define it's success

It was a joke, in case you didn't catch it. In fact all you can reasonably define is survive-ability of a typical organism of a species to define it's success compared to other species. That is the only meaningful comparison that can be made. Intelligence as we commonly define it is only a tool for survival.