The superiority of the dolphins and the mice has long been known, but there are other claims that need to be taken far more seriously than those of the humans. Cats, it has been established, have both the vocal mechanism and the intelligence for human speech. They disdain it. No self-respecting cat would be caught dead doing anything so obvious as to actually say what it wants. They are perfectly capable of communicating their demands with a tiny movement of ear or tail, or, if their human is exceptionally dull, with a single barked triphthong.
Dogs are capable of licking their own private parts.
Dogs often ask whether, if humans had that capability, they wouldn't spend all of their time at it. Humans do have the distinction of being closely related to the only terran species to both master and use the language of another. The chimpanzee has learned and uses American Sign Language. This has caused the loss of many lucrative grants for clever experiments designed to discover how chimpanzees feel about things. Now one need simply ask them.