Why Indian crows are among the world’s most intelligent birds - The Indian Express

Wren: Welcome back to Bird Brains — the podcast where being called a bird brain is the highest compliment we know. I'm Wren, ornithologist, corvid obsessive, and your guide to the genuinely astonishing minds living inside the skulls of crows, ravens, magpies, and jays. Today we've got stories that will make you look at the crow on your fence post in a completely different way — we're talking tool use, brain architecture, and one of the most touching human-corvid relationships you've probably never heard of. But first, a huge thank you to our sponsors: Ada, who helps clients weave A I into their everyday workflows; Ago Consulting — that's "Ahh-Go" — silicon development experts covering everything from A I to SoC design; and Zen Semiconductor, an umbrella company with a remarkable portfolio spanning the silicon industry. These are the people keeping the lights on so we can talk about birds. Now — let's get into it. Wren: Alright, thread one. Corvid cleverness. And I want to start somewhere that might surprise you — India. Because when most people in the West picture the brainy crow, they picture the American crow or the Eurasian carrion crow. But the Indian house crow and the large-billed crow found across South and Southeast Asia? Absolutely formidable minds. The Indian Express recently ran a piece celebrating just how intelligent Indian crows are, and it's a great jumping-off point for something I genuinely love talking about — corvid tool use in the wild. Wren: So here's what we know about corvid tool use, and it is legitimately jaw-dropping. The gold standard case study is the New Caledonian crow. These birds, living on a small island in the Pacific, don't just pick up sticks and poke things. They manufacture tools. They select specific materials — particular plant stems, specific leaves — and they modify them. They tear barbs off a pandanus leaf to create a hooked probe, and then they use that hook to fish grubs out of tree bark. They are crafting implements with a specific end goal in mind. Wren: And here's the part that really gets me. Researchers at the University of Auckland set up experiments where New Caledonian crows had to figure out multi-step tool problems — like, you need tool A to get tool B, and then tool B to get the food. And these birds solved it. Not after weeks of trial and error. Some of them solved it on the very first attempt. Which suggests something beyond simple learning — it suggests mental simulation. They're running a kind of internal model of the problem before they act. Wren: Indian crows — the house crow in particular — show a different flavor of cleverness. They're urban survivors, extraordinarily adaptable, and they've been documented doing things like dropping hard-shelled foods onto roads and waiting for cars to crack them open. That's not instinct. That's a learned, culturally transmitted behavior. Young crows watch older crows do it and pick it up. Some populations have even been observed timing the traffic — waiting for red lights — so they can retrieve the food without becoming a casualty themselves. A bird. Timing. Traffic. Lights. Wren: And this gets at something important: corvid cleverness isn't one thing. It's a whole suite of cognitive tools — physical problem-solving, social learning, behavioral flexibility, and the ability to apply a solution in one context to a brand new situation. That's what we call transfer learning in cognitive science. Humans do it. Great apes do it. And crows do it. The company they're in should tell you everything. Wren: Okay, thread two. How their minds actually work. Because I get this question a lot — people hear these stories and they say, "Wren, these are birds. Their brains are tiny. How is any of this possible?" And I love this question because the answer completely upends what most of us were taught about brains. Wren: For a long time, the assumption in neuroscience was that the neocortex — the wrinkled outer layer of the mammalian brain — was the seat of higher cognition. Complex thought, planning, problem-solving. And birds don't have a neocortex. So the old assumption was: no neocortex, no real intelligence. Case closed. Except — the birds didn't read that memo. Wren: What researchers discovered, particularly in work coming out of labs in Germany and the Czech Republic, is that corvids have a region of their brain called the nidopallium caudolaterale — I promise I'm not making that up — which is functionally analogous to the mammalian prefrontal cortex. It's not the same structure. It evolved completely separately. But it does remarkably similar things. It's involved in planning, working memory, and flexible decision-making. Evolution, it turns out, found the same cognitive destination via a completely different road. Wren: And the density of neurons in corvid forebrains is extraordinary. A crow's brain has neurons packed in at a density comparable to primates. So yes, the brain is small in absolute terms. But the computational power per gram? Genuinely competitive. Size isn't everything, folks — and corvids are the proof. Wren: One of the most compelling demonstrations of corvid cognition involves what's called episodic-like memory. There's a famous series of experiments by Nicola Clayton at Cambridge — she's one of the world's leading corvid researchers — using western scrub-jays, now called California scrub-jays. She showed that these birds don't just remember where they hid food. They remember what they hid, where they hid it, and when. What, where, and when — which is the basic structure of episodic memory. The kind of memory that lets you mentally travel back in time to a specific experience. Wren: But here's where it gets even more interesting. Clayton's team showed that scrub-jays are also planning for the future. In one experiment, birds were given access to one compartment where they always got breakfast and another where they never did. When given the chance to cache food the evening before, the jays preferentially stored food in the no-breakfast room. They were planning for tomorrow's hunger. Future-oriented thinking. In a bird. This used to be considered a hallmark of human cognition. The jays missed that memo too. Wren: And then there's face recognition — which is where it gets personal. Crows recognize individual human faces. John Marzluff at the University of Washington ran experiments where researchers wore specific masks while trapping and handling crows — which, understandably, the crows did not enjoy. Afterward, crows specifically mobbed and harassed people wearing those masks, even years later, even when the mask was worn by a completely different person. They passed this information on socially. Other crows who'd never been trapped learned which face to distrust just by watching their flock-mates react. Social transmission of a grudge. Against a specific human face. Years later. I just want to sit with that for a second. Wren: Okay, thread three. Corvids and people. And I want to tell you about something that has become one of my absolute favorite documented cases of a human-corvid relationship, because it perfectly illustrates everything we've been talking about — memory, social bonding, reciprocity — all of it. Wren: You may have heard of Gabi Mann. She was a girl in Seattle who, starting around 2011 when she was about four years old, began accidentally sharing food with the crows in her neighborhood — dropping bits of food, spilling things, the way small children do. And the crows noticed. She and her mother began intentionally feeding the crows, and something remarkable happened: the crows started bringing gifts back. Wren: Small objects. A piece of a broken light bulb. A black button. A blue plastic heart. A screw. A tiny piece of metal with the word "best" on it. Beads, screws, a corroded pearl earring. The family kept them all in labeled bags with notes about when each item was found. By the time this story was documented by the BBC, Gabi had an entire collection. The crows weren't just eating and leaving. They were, in their way, reciprocating. Wren: Now — I want to be scientifically careful here because this is the kind of story that invites over-interpretation. We don't know with certainty what the crows' intention was in leaving these objects. Crows do cache shiny objects. They do sometimes drop things near food sources. But the consistency, the pattern, the relationship — it's hard not to see something social happening. And researchers who study corvid behavior take this seriously. Corvids live in complex social worlds. They form long-term bonds. They have what appear to be concepts of fairness and reciprocity. The gift-giving story fits, rather neatly, into everything we know about how these birds operate socially. Wren: And what I find most moving about the Gabi Mann story isn't the gifts themselves — it's the relationship it implies. These crows knew her. They distinguished her from other people. They had, over years, built something. A kind of ongoing exchange. Which, when you think about it, is not so different from how crows have been living alongside humans for thousands of years — watching us, learning from us, adapting to us. We built cities and the crows moved in. We left food scraps and the crows learned our schedules. We gave them masks to fear and they taught their neighbors. We gave them kindness and some of them, apparently, gave us buttons and a corroded pearl earring. Wren: There's a broader story here about urban ecology that I find genuinely hopeful. In a world where so many species are struggling to coexist with expanding human environments, corvids are thriving — not despite us, but in complex, dynamic relationship with us. They're not just surviving in cities. They're reading our cities, learning our rules, even exploiting our infrastructure — dropping nuts on crosswalks, nesting on cell towers, watching our garbage trucks on their rounds. They are students of the human world, and remarkably good ones. Wren: The large-billed crow in Japan learned which crosswalks had gentler traffic for nut-cracking. The carrion crows in urban Europe have learned to probe recycling bins with the same finesse that their ancestors used to probe carcasses. And the house crows of India and South Asia — the ones we started with — have been living in human settlements for so long that they have essentially co-evolved with our cities. They are genuinely urban birds in a way most species will never be, because they had the cognitive flexibility to get there. Wren: Intelligence, it turns out, is not one thing. It's not confined to a particular shape of brain or a specific evolutionary lineage. It emerges wherever there's complex pressure — social complexity, environmental challenge, the need to plan, adapt, remember, and relate. Corvids found their version of it on a completely separate branch of the tree of life, hundreds of millions of years after our shared ancestor. And the fact that we can look at a crow on a fence post and recognize something familiar — a problem-solver, a planner, a face-rememberer, a grudge-holder — that's not projection. That's convergent evolution doing something wonderful. Wren: Bird Brains, brought to you by Ada, Ago Consulting, and Zen Semiconductor — three teams who know a thing or two about building intelligence into systems, and who help make this show possible. If today's episode made you look at your neighborhood crow a little differently, that's exactly what we're here for. Subscribe wherever you get your podcasts, share with someone who needs to be surprised by the natural world, and check the link in show notes for everything we talked about today — the research, the researchers, the remarkable Gabi Mann and her collection of crow gifts. Stay curious, keep looking up, and remember — bird brain is the highest compliment we know.