Can Animals Talk?

You’re walking through the woods with a friend. She stops, points at a bush, and says, “Snake.” Just that one word. You know exactly what she means: there’s a snake near that bush, and you should be careful.

Now imagine you’re a vervet monkey in the African savanna. You hear another monkey make a specific call—a short, barking sound. You and the other monkeys scramble up into the trees. Why? Because that call means “leopard.”

Is that monkey talking? Is it using a word that means “leopard”? Or is it just making a noise because it’s scared?

This is the central question in the study of animal communication. Philosophers and scientists argue about whether animals can truly communicate like we do, or whether their signals are something fundamentally different. And behind this argument lies a bigger puzzle: what does it even mean to mean something?

What Do Animal Calls Mean?

For a long time, scientists thought animal calls were just emotional expressions—like crying or laughing. A monkey screams because it’s afraid, not because it’s saying “leopard.” This view goes back to Charles Darwin, who thought animal signals were more like feelings than words.

But in the 1980s, researchers studying vervet monkeys made a startling discovery. The monkeys had three distinct alarm calls: one for leopards, one for eagles, and one for snakes. When a monkey heard the “eagle” call, it looked up and ran into the bushes. When it heard the “snake” call, it stood on two legs and looked down. The calls seemed to refer to specific predators, just like words do.

This idea is called functional reference. The word “functional” is important because it lets scientists avoid a tricky question: are the monkeys thinking about leopards when they make the call, or are they just reacting automatically? “Functional reference” says: whatever’s going on inside the monkey’s head, the call functions as if it refers to leopards. It’s useful to talk about it that way.

Not everyone is convinced. Some researchers argue that vervet calls aren’t actually that precise—monkeys make “eagle” calls at falling trees and baboon fights too. And even when calls are specific, they might not be under the monkey’s voluntary control. A monkey might produce an “eagle” call the same way you flinch when something flies at your face: automatically, without deciding to do it. That’s very different from choosing your words deliberately.

But Do Animals KNOW What Their Words Mean?

This is where things get really tricky. Let’s say you teach a chimpanzee named Nim to use sign language. Nim learns to sign “apple” when he wants an apple. Does he know what “apple” means?

Some philosophers say no. They argue that knowing a word’s meaning means connecting that word to a concept—an idea in your mind. If Nim doesn’t have a human-like concept of apple, then he doesn’t really know what “apple” means. Skeptics point out that Nim once signed “apple” when he saw a knife used to cut apples. To them, this shows he had a “hodge-podge of loose associations” rather than a real concept.

Other philosophers disagree. They say knowing a word’s meaning is simpler: it’s knowing how to use the word. If Nim signs “apple” to request an apple, and understands when someone else signs it, then he knows what it means. On this view, the knife incident isn’t confusion—it’s Nim cleverly requesting an apple in the presence of something associated with apples.

This debate isn’t settled. It depends on what you think “meaning” is in the first place—a question philosophers have argued about for over a hundred years.

Can Animals Combine Signals Like Sentences?

Human language isn’t just about individual words. We combine words into sentences to express new thoughts. This is called syntax—the rules for putting words together.

Some philosophers think syntax is what makes human language truly unique. They argue that our brains have a special ability called “Merge” that combines ideas into hierarchical structures. For example, in “very old house,” “very” modifies “old,” not “house.” The structure is [[very old] house]. This kind of nesting, they say, is uniquely human.

What about animals? Do they combine signals?

Yes, but the question is whether the combinations work like human syntax. Consider putty-nosed monkeys. They have a call for “eagle” and a call for “leopard.” When they combine them in sequence—“pyow-hack”—it means something completely different: “let’s move as a group.” This is interesting, but it’s not like combining words to make a sentence. The meaning of the combination isn’t built from the meanings of the parts. It’s more like having two buttons that, when pressed together, make a third sound.

More impressive are Japanese tits. They have an “ABC” call that means something like “danger” and a “D” call that means “come here.” When they combine them as “ABC-D,” it means “come help me mob this predator.” Crucially, they don’t respond to “D-ABC” the same way, suggesting they’re sensitive to the order of calls. Some scientists argue this is genuine compositional syntax.

But skeptics have a deflationary explanation. They say the “ABC-D” sequence might just be the bird saying “Danger!” and then “Come here!” as separate utterances, one after the other. The birds respond differently to “D-ABC” because you wouldn’t say “Come here!” before warning about danger.

The most famous case of animal language comprehension comes from Kanzi, a bonobo raised by humans. Kanzi learned to use a keyboard with symbols (called lexigrams) and reportedly understood thousands of English words. When researchers said, “Put the tomato in the oil,” he put the tomato in the oil. When they said, “Put some oil in the tomato,” he put oil in the tomato. He seemed to understand word order.

But did Kanzi understand the structure of sentences? Later analysis suggests he tracked word order but couldn’t handle more complex grammar. When asked to “Fetch the tomato and the oil,” he’d typically bring only one. He couldn’t grasp that “and” binds two objects to the same verb. This suggests he understood sequence but not hierarchy.

Currently, there’s no strong evidence of hierarchical syntax in any animal—either in production or comprehension.

What About Context and Intentions?

Human communication depends heavily on context. If I say “It’s cold in here” while shivering, you might understand I’m asking you to close the window. The same sentence can mean different things in different situations.

Animals also interpret signals in context. Putty-nosed monkeys sometimes give “eagle” calls in non-predator situations, like when a tree falls. When they do, other monkeys don’t run away—they seem to understand that the context changes the meaning.

Some philosophers argue this shows animal communication is pragmatically rich—like human language. Others say it’s too simple. After all, you also interpret smoke as meaning fire, and that’s not really communication.

A different approach focuses on intentions. When you communicate with someone, you intend for them to understand you. You don’t just make a noise; you mean for them to get a message. Philosopher Paul Grice argued that real communication requires the speaker to have a special kind of intention: I intend for you to recognize that I’m trying to communicate with you, and I intend for you to respond based on that recognition.

This is called Gricean communication. Many philosophers think it’s too cognitively demanding for animals. It might require thinking about what others are thinking about what you’re thinking—like mental nesting dolls. Even human children struggle with this until they’re quite old.

But some philosophers argue that Gricean communication can be simpler than it sounds. They say that making eye contact can fulfill the requirement of making your intention public. If you look at someone while gesturing, you’re signaling that you’re trying to communicate. And chimpanzees do make eye contact when gesturing.

Others think this goes too far. They propose “intermediary” views where animals can communicate intentionally without full Gricean intentions. For example, a chimpanzee who leaps away from a snake shows both the snake’s presence and her fear of it—she “expresses” her state without needing complex thoughts about what you’re thinking.

Is Animal Communication Cooperative?

When you tell a friend where to find food, you’re being helpful. You’re not getting anything directly in return—at least not in that moment. This kind of cooperative communication—sharing information for its own sake—seems rare in animals.

Chimpanzees mostly communicate to make requests: “Groom me,” “Give me that food.” They rarely seem to share information just to be helpful. Some researchers argue this is why chimpanzees are bad at understanding pointing. When a human points at a hidden banana, a chimpanzee doesn’t automatically understand the human is helping them find food.

But this might be changing. Recent studies found that chimpanzees will call to warn others about the presence of sleeping snakes—even when they themselves aren’t in danger. This looks like helpful information-sharing.

Even if animals don’t cooperate like humans, signaling theory offers a different way to think about cooperation. On this view, communication is about coordination between sender and receiver. A sender produces a signal, and a receiver responds in a way that benefits both. The signal doesn’t need to be intentional or helpful—it just needs to work. Even bacteria and cells communicate in this minimal sense.

So… Can Animals Talk?

The honest answer is: nobody really knows. Or rather, it depends on what you mean by “talk.”

If “talking” means using signals that refer to things in the world, then yes—many animals do this. Vervet monkeys, prairie dogs, and bees all have calls that seem to refer to specific predators or food sources.

If “talking” means combining signals into structured sentences, then probably not—at least not in the way humans do. No animal has shown evidence of hierarchical syntax like human language.

If “talking” means communicating with the intention to share information helpfully, then maybe in some cases—but it’s rare and limited compared to humans.

And if “talking” means knowing what your words mean… well, that depends on what you think meaning is.

What makes this debate fascinating is that it forces us to ask what we are doing when we talk. What is it about human language that’s special? Is it our ability to combine words? Our intentions? Our helpfulness? Our concepts? The answer shapes how we see ourselves—and how we see the other creatures we share the planet with.

Key Terms

Term	What it does in this debate
Functional reference	A way of talking about animal calls that function like words, without claiming the animals have human-like thoughts
Syntax	The rules for combining signals (like words) into larger, structured units (like sentences)
Compositional syntax	When the meaning of a combined signal depends on the meanings of its parts and how they’re arranged
Gricean communication	Communication where the speaker intends for the listener to recognize their communicative intention
Pragmatics	How context and intentions affect the interpretation of signals
Signaling theory	A framework that explains communication as coordination between senders and receivers, without needing intentions
Cooperative communication	When someone communicates to benefit the listener, not just themselves

Key People

Paul Grice (1913–1988) — British philosopher who argued that real communication involves special intentions about what you want your audience to understand
Noam Chomsky (born 1928) — American linguist who argues that the ability for syntax is uniquely human and made possible by a special brain mechanism called “Merge”
Michael Tomasello (born 1950) — American psychologist who argues that human communication is uniquely cooperative, and that animals mostly communicate to make requests, not share information
Dorothy Cheney and Robert Seyfarth — Primatologists who first documented vervet monkey alarm calls and argued they function like words
Sue Savage-Rumbaugh — Researcher who raised the bonobo Kanzi and demonstrated his ability to understand human language and use symbols

Things to Think About

If you taught a dog to press a button that says “outside” when it needs to go out, does the dog know what “outside” means? What would count as evidence either way?
Grice argued that real communication requires you to intend for your audience to recognize your intention. But if animals can’t have these intentions, is their communication still meaningful? Or is it just… noise?
Some philosophers think human language is fundamentally different from animal communication. Others see a continuum—more like shades of gray than a sharp divide. Which view seems more convincing to you? Why?
If we discovered that dolphins have their own language with syntax and meaning, would that change how we think about dolphins? Should it change how we treat them?

Where This Shows Up

Your pets. When your cat meows at you, is it communicating intentionally—or just making noise? Understanding this debate helps you think about what your cat is actually doing.
Social media. Emojis, memes, and abbreviations like “lol” are fascinating cases of communication that aren’t quite language. How are animal calls like emojis? How are they different?
Artificial intelligence. When you talk to a chatbot, does it mean what it says? Programmers and philosophers wrestle with the same questions about AI that they ask about animals.
Conservation. Understanding how animals communicate could help us protect them—for example, by not playing loud music near whales or not building wind farms on bird migration routes.
Language evolution. Debates about animal communication are really debates about where human language came from—and what it means to be human.