Wile E. Coyote, the card-carrying genius, talks in multiple episodes, almost all of which feature Bugs Bunny. He does more than talk; he expounds upon his genius. His vocabulary and general manner of speech prove him to be one of the most educated characters in the Looney Tunes universe, possibly even more so than Elmer Fudd, Ph.D. Given that we never hear him make so much as a squeak or yelp in any of the Road Runner cartoons, we can assume that there's more to the story than what we're seeing on the screen.
In the above video, it's obvious Wile E. couldn't keep his mouth shut if Shaquille O'Neal was trying to fist his throat. Clearly, if it were everyone's favorite Coyote ordering a gross of catapults in the middle of the Sonoran Desert, he could have talked the Road Runner to death by now. But this desert Coyote wouldn't say s**t with a mouth full of it. In fact, it seems like he can't speak and has to resort to placards and desperately sad looks to express himself. So who, exactly, is it that has an ACME charge card and an Amazon Prime account in the middle of Arizona? Coyote clones.
According to the Merrie Melodies universe, there are hundreds of them in existence, and they all appear together in the episode "Ready, Set, Zoom!" There we see a Coyote attempting to catch the Road Runner by putting on a female Road Runner costume, but once he is dressed, hundreds of identical Coyotes pop up from behind various desert rocks, lick their lips, and run after him, because if there is one constant in the Looney Tunes universe it's that cross-dressing leads to uncontrolled boners and/or hunger.