Discover the Top 4 Smartest Birds Flying Around the United States - A-Z Animals

Wren: Welcome back to Bird Brains — the show where we take the biggest insult you can hurl at someone's intelligence and turn it into the highest compliment we know. I'm Wren, ornithologist, science communicator, and card-carrying corvid obsessive, and I am so glad you're here. Today's episode is brought to you by our wonderful sponsors — Ada, who helps businesses integrate A I into their workflows in ways that actually make sense; Ago Consulting, silicon development experts covering everything from A I to SoC; and Zen Semiconductor, an umbrella company with a remarkable portfolio spanning the silicon industry. We couldn't do this without them. Now — today we are getting into crow neuroscience, raven grudges, and what happens when science confirms what anyone who's ever locked eyes with a crow already suspected: there is a lot going on behind those gleaming black eyes. Let's go. Wren: Okay, thread one — Corvid Cleverness — and I want to start with something that I think genuinely earns the word shocking. Not in a clickbait way. In a sit-down-and-reconsider-your-worldview way. Crows use tools. I know, I know, you might have heard that before, but let me make sure the full weight of it lands, because we throw that phrase around and it can slide right off. Tool use — selecting or modifying an object from the environment to achieve a goal — was, for a very long time, considered one of the defining markers of human intelligence. Then we grudgingly extended it to great apes. Then a few other mammals. And then, crows showed up and completely scrambled the rankings. Wren: New Caledonian crows are probably the rock stars of corvid tool use. These birds — living on a small island in the South Pacific — have been documented not just picking up sticks, but manufacturing hooks. They find a branching twig, strip it, shape it, and use that hook to fish grubs out of holes in logs. That is multi-step fabrication. And here's what really gets me: when researchers give New Caledonian crows a problem that requires using one tool to obtain a second tool, which is then used to get the food — a meta-tool task — they crack it. Young children often struggle with that. Let that sit for a second. Wren: But we don't have to go to the South Pacific. Right here in the United States, American crows are doing things that would have seemed impossible to ornithologists a generation ago. They've been observed dropping hard-shelled nuts onto roads — not randomly, but specifically at crosswalks, and then waiting for the traffic light to change before going down to retrieve the cracked-open nut. They learned to use cars as nutcrackers. And then they learned traffic signals. That's not instinct. Instinct doesn't come with a working knowledge of pedestrian safety infrastructure. Wren: Ravens have their own flavor of cleverness — more focused on social complexity and planning. There's a famous series of experiments by researcher Thomas Bugnyar and his colleagues where ravens were shown a researcher hiding food, and then given the opportunity to retrieve it — even when they had to plan ahead, carrying a token to a different location to exchange it for food later. Ravens passed these tasks with an ease that put them in company with great apes. They can plan for future needs. They can delay gratification. They can think about what's coming next. For a bird, for any non-human animal, that is extraordinary. Wren: And jays — specifically western scrub jays, now called California scrub-jays — they do something called episodic-like memory. They remember not just what food they cached, but where they cached it, and when. They'll go back and move food they've hidden if they think another bird watched them hide it. They have a theory of deception. They know that knowledge is power, and they act on it. These are not reflexes. This is cognition. Wren: Thread two — How Their Minds Work — and this is where I get to geek out a little, because there is genuinely exciting neuroscience happening right now around corvid brains, and a recent piece in New Scientist put a spotlight on research that I think deserves a wider audience. Here's the puzzle that scientists have been trying to crack for decades: birds have tiny brains. Relative to body size, a crow's brain is much smaller than a primate's. So how on earth are they doing all of this? How are they planning, deceiving, remembering, fabricating tools? The answer, it turns out, might be in the numbers — specifically, the number of neurons. Wren: Research has found that corvid brains — and this goes for parrots too — pack neurons in at an extraordinarily high density. A crow's brain, though small in volume, contains a concentration of neurons in the forebrain that rivals or even exceeds what you'd find in much larger primate brains. It's not the size of the library. It's how many books are crammed onto those shelves — and how well organized they are. Crows may owe their remarkable cognitive abilities to an abundance of neurons in their pallium — that's the bird equivalent of the cerebral cortex, the part of the brain associated with higher-order thinking in mammals. Wren: And here's where it gets philosophically interesting. For a very long time, the cortex was considered the seat of intelligence in vertebrates. It's what mammals have. Birds don't have a cortex — they have a differently structured forebrain. Scientists used to take that as evidence that birds were cognitively limited. But that was a failure of imagination on our part, not a limitation in the birds. Evolution found a different path to the same destination. The architecture is different, but the output — problem-solving, planning, social intelligence — is strikingly similar. Wren: Face recognition is another jaw-dropping example of how corvid cognition works in practice. John Marzluff at the University of Washington conducted a now-famous experiment where researchers wore caveman masks while trapping and banding crows on campus. Those crows — and their offspring, and crows who had never personally encountered the masked researchers — learned to recognize and mob those specific mask-wearers for years afterward. The crows held a collective memory. They shared information across their social networks about which human faces were dangerous. When Marzluff walked the same routes wearing a neutral mask, nothing happened. Caveman mask? Chaos. Wren: What that tells us is that crows don't just have individual memory — they have social learning, cultural transmission of information, and the ability to distinguish human faces in a way that tracks individual identity over time. That's a set of cognitive skills that we don't usually associate with animals that weigh about a pound. But then again, we keep using the wrong benchmarks. The crow isn't failing to be a primate. It's succeeding at being a crow — and it's doing it brilliantly. Wren: Thread three — A Corvid-and-People Story — and this one comes straight out of recent research, and it involves ravens, grudges, and what happens when a bird decides you've wronged them. Time Magazine covered a study that found ravens remember people who have wronged them — and that memory is not short-lived or vague. It persists. Ravens who had been treated unfairly in exchanges — where a human cheated them out of an expected reward — subsequently showed wariness and avoidance toward that specific individual, even when that person later tried to interact with them normally. The raven didn't forget. The raven didn't forgive. The raven remembered your face and adjusted their behavior accordingly, possibly for years. Wren: Now, some of you might be listening to that and feeling a little nervous — like, should I be worried about the ravens in my neighborhood? And honestly, maybe a little. But flip it around, because the same cognitive machinery that allows ravens to hold grudges also allows them to recognize and remember kindness. There are dozens of documented cases of crows bringing gifts to people who feed them regularly. Shiny objects, buttons, pieces of foil, once a tiny heart-shaped piece of metal. These aren't random. Researchers believe this is a reciprocal exchange behavior — the crow has learned that this person provides food, and the crow is, in some sense, offering something back. Wren: One of the most touching documented cases involves a girl in Seattle named Gabi Mann, who started leaving food for crows when she was a young child — mostly accidentally at first, dropping bits of lunch. The crows noticed. They started waiting for her. And then they started leaving things in exchange: a rusted screw, a small piece of glass, a button, a tiny piece of metal with the word "best" on it. Her mother kept the gifts catalogued in labeled bags. When researchers looked at this, they weren't dismissive. This fits a pattern seen in corvid behavior where social bonds are reinforced through exchange. The crows had made Gabi Mann part of their social world. Wren: And then there's the grudge side of things, which has real-world implications. John Marzluff's research — the same face-recognition work I mentioned earlier — showed that the crows didn't just remember the trapper individually. They recruited other crows. They passed the information. Crows that had never met the masked researcher learned from crows that had. This is culture. This is information being transmitted socially across a community, shaping collective behavior. That is not something we expected to find in birds. That's something we associate with human societies, with storytelling, with warning our children about dangers we've personally experienced. Wren: What strikes me most about the raven grudge research, and about all of this, is what it implies about the inner life of these animals. To hold a grudge, you have to remember a specific individual. You have to connect that individual to a past event. You have to update your behavioral strategy based on that memory. That's a lot of cognitive steps. That's not a simple stimulus-response reflex. That's something that looks, from the outside, a lot like what we'd call a social judgment. Ravens are making assessments of individuals and acting accordingly. They have, in a very real sense, opinions about people. Wren: And now there's also new research out of Phys.org looking at crow populations from a very different angle — the genetic health of crow communities. A study found that inbreeding in crows can lead to higher rates of disease in offspring. This might sound like a detour from intelligence, but it actually connects beautifully: the social complexity we've been talking about — the large, structured communities, the cultural transmission of information, the long-term relationships — all of that creates the conditions for avoiding inbreeding. Crows know their social world in fine-grained detail. They know who's who. And maintaining that social knowledge has health benefits that ripple across generations. Wren: So here's where I land, every single time I dive deep into corvid science. Intelligence is not one thing. It's not a single ladder with humans at the top. It's a sprawling, branching, endlessly surprising set of solutions to the problem of surviving in a complex world. Crows and ravens found their solutions through dense, efficient neural architecture, extraordinary social bonds, long memories, and an uncanny ability to read the humans around them. They are not trying to be us. They're being themselves — and themselves turns out to be remarkable. Bird Brains, brought to you by Ada, Ago Consulting, and Zen Semiconductor — three companies that know a thing or two about building intelligence into systems. I think the crows would approve. If this episode made you look twice at the next crow you pass on the street — good. Stay curious, subscribe wherever you get your podcasts, and share this with someone who needs to have their assumptions gently dismantled. All the links and research we talked about today are in the show notes. Until next time — keep your eyes up, keep your mind open, and never, ever underestimate a bird brain.