Alex: (talking into a phone) Hello? Get me Missing Animals! And hurry! We've got a lost zebra, probably on the way to Connecticut by now, and we're gonna need—
(cut to the operator, who hears only growling on the other end)
Operator: Hello? Hello?
People, you will discover, consider themselves the only creatures in the universe capable of communication, and unless you ape their particular set of noises they think you can't "talk", as they call it. An idiot parrot who can be taught to screech "skin you!" is thought to be very clever. Two house-martins calling to each other the exact directions of how to get to London to East Africa are dismissed as "dumb creatures" who are "only twittering".