Felis domesticus aka the House Cat. The highest form of life on
Earth. Has used hypnotic powers of
cuteness to enslave Homo sapiens to provide it with food and shelter, and, most importantly, a life of total
freedom and leisure.
Canis familiaris saw what great success Felis domesticus had with enslaving the Homo sapiens primates, and almost accomplished the same feat with their similar powers of hypnotic cuteness, however, for some reason, the canines, for the most part, did not end up with the same levels of
freedom as their feline counterparts, making them, in our
opinion, the second smartest spieces on planet
Earth, followed by Homo sapiens in a distant third place.
P.S. A late breaking development: A much more rare spieces, the ferret, may be tied with Canis familiaris for 2nd place in the planet
Earth Intelligence Quotient, more details will be given upon further investigation.