Wildlife Moment: American crow's intelligence is redefining the term 'bird brain' - Yakima Herald-Republic

Wren: Hey there, and welcome to Bird Brains — the show where being called a bird brain is absolutely, one hundred percent, a compliment. I'm Wren, ornithologist, crow enthusiast, and your guide to the surprisingly rich inner lives of corvids — that's crows, ravens, magpies, and jays. Today we've got a genuinely fascinating lineup: we're talking about American crows rewriting what we think we know about animal intelligence, we're diving into the eerie, moving phenomenon of crow funerals — yes, you heard that right — and we're exploring what happens when two crow species blur their boundaries in one of the most unusual research zones on the planet. Before we dive in, a huge thank you to our sponsors: Ada, who helps organizations meaningfully integrate A I into their workflows; Ago Consulting — pronounced "Ahh-Go" — your go-to for silicon development consulting from A I all the way to SoC; and Zen Semiconductor, an umbrella company with an incredible portfolio spanning the silicon industry. Couldn't do this without them. Alright — let's get into it. Wren: So, thread one. Corvid Cleverness. And I want to start with a question that sounds almost too simple: what does it actually mean to be smart? Because for a long time, we had this very tidy, very human-centric answer. Big brain, big neocortex, big intelligence. And then corvids came along and just... absolutely blew that up. American crows in particular have been turning heads — and not just because they're loud and opinionated, though they are both of those things. There's been a growing body of work looking at American crows in the wild and in controlled lab settings, and what researchers keep finding is that these birds aren't just reacting to their environment — they're reasoning about it. One of the classic demonstrations of this is their relationship with tools. Now, when most people think of tool-using animals, they think of chimpanzees, maybe dolphins. Crows do not come to mind. But they absolutely should. Wild crows — particularly New Caledonian crows, which are a separate species but in the corvid family — have been documented manufacturing hooked tools from plant stems to extract grubs from bark. Manufacturing. Not just picking up a stick. Shaping it. And American crows, while perhaps a bit more opportunistic in their tool use, have shown remarkable flexibility in solving multi-step problems. There's a famous experimental setup called the Aesop's Fable task — named after the old story about a crow dropping stones into a pitcher to raise the water level. Researchers actually tested corvids on a version of this, offering them floating rewards in tubes and a pile of objects nearby. Crows figured out that dropping heavy objects raised the water level and got them the treat. They chose stones over hollow objects, solid over light, tubes with water over tubes with sand. That's not trial and error — that's causal reasoning. They understand why it works. And if that doesn't make you rethink the phrase "bird brain," I genuinely don't know what will. Wren: What's really striking when you dig into the crow intelligence literature is just how early this cleverness shows up. Young crows — juveniles — are curious in a way that looks almost reckless. They pick things up, manipulate them, carry them around, drop them to see what happens. Researchers think this extended juvenile play period, which crows share with ravens, is actually part of how they build their problem-solving toolkit. They're not born knowing how to use a tool — they're born with the capacity to figure it out, and they spend years doing exactly that. Crow brains, by the way, are enormous relative to their body size. The ratio is comparable to that of chimpanzees and, remarkably, approaches that of humans. But here's the twist — they achieve all this without a neocortex. The structure we long assumed was the seat of higher thought in mammals. Corvids do their heavy cognitive lifting in a region called the pallium, which has turned out to be far more sophisticated than anyone expected. It's a good reminder that evolution doesn't have one path to intelligence. It has many. And the crows found one of them entirely on their own. Wren: Thread two. How Their Minds Work. And I want to talk about something that sits right at the intersection of science and the uncanny — crow funerals. Now, I know how that sounds. I know. But stay with me, because the research here is genuinely remarkable, and it comes from some careful, rigorous work out of the University of Washington. What researchers there observed — and this has been written up in serious scientific literature — is that when a crow dies, other crows gather around the body. Not just one or two. Sometimes dozens. They're loud. They're agitated. They're clearly paying attention to the dead individual. And then they leave. And this is not just morbid curiosity. Subsequent studies showed that crows who attended these gatherings learned to associate the location — or sometimes a human nearby — with danger. They were gathering information. The "funeral" is, at its core, a learning event. A dead crow is a clue. Something in this place, or near this creature, is dangerous. And crows share that information socially. They remember it. They pass it on. There's a famous series of experiments where researchers wore specific masks while handling dead crows on the University of Washington campus. Crows who saw the masked person near a dead crow subsequently scolded that masked person — specifically that mask — for weeks. Months. Even when other people were around. The crow remembered the face — well, the mask — that it associated with danger, and it told other crows. Birds that had never even seen the original incident learned to scold the mask too, because they picked it up from the group. That is cultural transmission of information. That is a society. Wren: And this is where crow cognition gets genuinely philosophical. Because what does it mean to gather around your dead? In humans, we call it mourning. We call it ritual. We build meaning around it. Now, I'm not going to stand here and tell you that crows grieve in the way we do — we simply can't know that. But we can say that they respond to death in a way that is purposeful, social, and informative. They are updating their model of the world based on the loss of one of their own. And that model — that internal map of who is dangerous, where is safe, what has changed — is something they carry with them and share with others. Crows also cache food, and the memory work involved in that is extraordinary. A single crow can remember the locations of thousands of food caches over periods of months. They also remember who was watching when they cached — and if they think they were observed, they'll move the food later. That's not just memory. That's perspective-taking. They're modeling what another individual knows. Researchers call this theory of mind, and it's the kind of cognitive feat we used to think was exclusively human. Corvids keep proving us wrong, and honestly, I find that thrilling. Wren: Thread three. Corvids and People. And for this one, I want to zoom out to a corner of Europe where the boundary between two crow species is doing something deeply unusual — and where scientists are getting a rare window into how new species form, and how they don't. There's a zone in Europe — running roughly through central Europe, including parts of Germany — where hooded crows and carrion crows meet. These are closely related species. Hooded crows have that distinctive grey-and-black patchwork. Carrion crows are all black. In most of their range, they live separately. But in this contact zone, they interbreed. And what's fascinating is that this zone has remained remarkably stable for a very long time — the hybrid birds exist, they survive, but the two species haven't fully merged. Researchers have been studying this phenomenon to understand what keeps species distinct even when they can and do interbreed. Part of the answer seems to be mate preference — birds tend to prefer partners that look like themselves. And part of it may involve the genetics of color patterning, which appears to be tied to relatively few genes with large effects. What makes this current research even more interesting is where some of it is happening — in restricted or unusual zones where human activity has shaped the landscape in unexpected ways. Areas that have been depopulated or are otherwise off-limits to most human activity sometimes become accidental wildlife refuges, and these hybrid crow populations have, in some cases, taken advantage of exactly that kind of space. Nature, as ever, finds a way. And crows — adaptable, opportunistic, brilliant crows — are often leading the charge. Wren: What I love about this story is what it says about corvids and people more broadly. Because crows have always lived alongside us. They followed early human settlements, they raided our grain stores, they picked through our middens. And in doing so, they learned us. They learned our schedules, our habits, our faces. They figured out that cars crush nuts if you drop them in traffic lanes at the right moment — wild crows in Japan documented doing exactly this, even using crosswalks to retrieve the crushed nuts safely when the light turned red. They figured out that following human hunters leads to food. They figured out that garbage trucks mean opportunity. Every time we changed our behavior, they adapted. Every time we built something new, they investigated it. There's an argument to be made — and some researchers do make it — that corvids have been shaped by their proximity to humans just as much as dogs have, just through a very different mechanism. Not domestication. Something more like... a negotiated coexistence. A long, ongoing, mutual study. They've been watching us for thousands of years. And based on everything we know about their memories and their social learning, they've probably passed down what they've learned. Generation to generation. A cultural knowledge of humans, built up over millennia. If that doesn't give you chills, I don't know what will. Wren: And that's really what I keep coming back to — the idea that intelligence isn't one thing, in one shape, in one kind of skull. It's a solution to a problem, and different creatures have solved it in breathtakingly different ways. Crows figured out how to read the world — socially, spatially, causally — and they did it with a brain the size of a walnut and not a neocortex in sight. Every time we find a new piece of evidence for corvid cognition, it nudges us a little further from the comfortable assumption that minds like ours are the only minds worth talking about. And I think that's a beautiful, humbling thing. This has been Bird Brains, brought to you by Ada, Ago Consulting, and Zen Semiconductor — three teams that know a thing or two about building intelligence, in their own very different ways. If today's episode surprised you — and I really hope it did — please subscribe, leave a review, and share it with someone who still uses "bird brain" as an insult. We're working on converting them, one episode at a time. Full details on all the research and stories we talked about today are in the link in show notes. Stay curious, friends. The crows are watching.