The fact of the matter is that humans tend to get all of our information through language, either written or verbal. We extend this expectation to other animals

The fact of the matter is that humans tend to get all of our information through language, either written or verbal. We extend this expectation to other animals, that any intelligent animal must have a complex verbal language. However, we frequently underestimate the audible range. You mentioned elephants ULF calls, which are known to travel between herds. However likely low in information. Yet man's best friend (dog's) communicate almost exclusively through body language and scent. One of my friend's dogs barks viciously at anyone, to the point strangers are scared of it. However, take one step towards it after it backs and it runs away. People mistakenly take the bark as aggression, when it's really fear. Essentially the dog is able to lie to us.