Follow Slashdot blog updates by subscribing to our blog RSS feed

 



Forgot your password?
typodupeerror
×
Earth Science

Crows Could Be the Smartest Animal Other Than Primates (bbc.com) 130

In a piece for the BBC, Chris Baraniuk writes about how the intelligence of New Caledonian crows may be far more advanced than we ever thought possible. An anonymous reader shares an excerpt from the report: Intelligence is rooted in the brain. Clever primates -- including humans -- have a particular structure in their brains called the neocortex. It is thought that this helps to make advanced cognition possible. Corvids, notably, do not have this structure. [New Caledonian crows belong to the corvid family of birds -- as do jackdaws, rooks, jays, magpies and ravens.] They have instead evolved densely packed clusters of neurons that afford them similar mental prowess. The specific kind of brain they have doesn't really matter -- corvids and primates share some of the same basic capabilities in terms of problem-solving and plasticity, or being able to adapt and change in the face of new information and experiences. This is an example of convergent evolution, where completely different evolutionary histories have led to the same feature or behavior. It's easy for humans to see why the things corvids can do are useful. From identifying people who have previously posed a threat to them or others in their group to using gestures for communication -- we too rely on abilities like these.

[Christian Rutz at the University of St Andrews] is unequivocal. Some birds, like the New Caledonian crows he studies -- can do remarkable things. In a paper published earlier this year, he and his co-authors described how New Caledonians seek out a specific type of plant stem from which to make their hooked tools. Experiments showed that crows found the stems they desired even when they had been disguised with leaves from a different plant species. This suggested that the birds were selecting a kind of material for their tools that they knew was just right for the job. You wouldn't use a spanner to hammer in a nail, would you? Ranking the intelligence of animals seems an increasingly pointless exercise when one considers the really important thing: how well that animal is adapted to its niche. In the wild, New Caledonians use their tools to scoop insects out of holes, for example in tree trunks. Footage of this behavior has been caught on camera.

You might think that some animals are smarter than others -- with humans at the top of the proverbial tree. Certainly, humans do rely excessively on intelligence to get by. But that doesn't mean we're the best at every mental task. Chimps, notes Dakota McCoy at Harvard University, have been shown to possess better short-term memories than humans. This might help them to memorize where food is located in the forest canopy, for example. Ranking the intelligence of animals seems an increasingly pointless exercise when one considers the really important thing: how well that animal is adapted to its niche. Intelligence is, first and foremost, a means towards specialization.
"New Caledonian crows, like us and other clever animals, have moods and memories. Strategies and expectations. They seem remarkably able to engage with complexity," writes Baraniuk in closing. "Evolution made this possible. But cognition, like life itself, serves more than just a need. Animal intelligence allows all sorts of fascinating phenomena to arise. [...] Nature provided the notes, but animal brains make the music. The mind, as they say, is the only limit."
This discussion has been archived. No new comments can be posted.

Crows Could Be the Smartest Animal Other Than Primates

Comments Filter:
  • Tend to be the ones who have the least of it.

    We know what intelligence is. It is the ability to understand something new and apply that knowledge. Creating a test for intelligence is often hard especially a test for animals lacking hands and even harder the ability to store things (dolphins and whales) but then that is a test of the intelligence of the tester.
    • by quenda ( 644621 )

      We know what intelligence is.

      But do we exactly? I'll say yes when we can make a true AI. You don't need to totally understand something in science to be able to use it and measure it though.
      Newton never knew what gravity really was, but came up with a very good model than could predict what it did, and could measure it well.

      We think of intelligence as a single linear measure, because psychologists found that many different intelligence tests were highly correlated. It is repeatable and has great predictive power. Like Newtonian phy

      • by stealth_finger ( 1809752 ) on Friday December 13, 2019 @05:06AM (#59515298)

        We know what intelligence is.

        But do we exactly?

        I'd say we know what it looks like more than what it is.

      • Uhhmm, we still don't know what gravity is, we know it manifests in mass occupying spacetime, but ask any physicist what causes gravity and blank look will say it all. He'll, we really are just startin to understand magnetism, and we have known about that even longer.

        • by quenda ( 644621 )

          He'll, we really are just startin to understand magnetism, and we have known about that even longer.

          No, the "why" of both gravity and magnetism were explained a hundred years ago by relativity. Both are illusions in a sense, and disappear when you use relativity instead of classical mechanics. Just as centripetal force does not exist in an inertial reference frame.

          We know what they are as much as we know anything. (until you get down to the quantum scale)

          • by gweihir ( 88907 )

            Actually, relativity does not explain anything here. It is just a more accurate model, i.e. it is a better description. An explanation is something different.

      • by gweihir ( 88907 )

        We know what intelligence is.

        But do we exactly? I'll say yes when we can make a true AI. You don't need to totally understand something in science to be able to use it and measure it though.
        Newton never knew what gravity really was, but came up with a very good model than could predict what it did, and could measure it well.

        We do not know what gravity is any more than Newton. We can just describe its effects better and we have a pretty strong hint that the model we currently use is wrong (no quantum-gravity), although gravity may be the part that is correct. More likely though the whole thing is missing some critical yet-to-be discovered component.

    • by gtall ( 79522 )

      Intelligence is also getting humans to board and feed you, take out your dooty, provide entertainment, heating the winter, cooling in the summer, all for sporting a furry coat, whiskers, and the ability to hide when not wanting to be bothered. Humans should be so intelligent.

    • I'm not sure all humans would qualify as intelligent by that definition.

    • by gweihir ( 88907 )

      We know what intelligence is.

      Nope.

      It is the ability to understand something new and apply that knowledge.

      That is both a crass oversimplification and far to fuzzy a definition to be useful. It is pretty much all we have, though.

  • Ranking the intelligence of animals seems an increasingly pointless exercise when one considers the really important thing: how well that animal is adapted to its niche. Intelligence is, first and foremost, a means towards specialization.

    If you redefine the word "intelligence" correctly, then a stone is the most intelligent animal. It keeps away tigers. You might need to redefine "animal" too for that one.

    • by ShanghaiBill ( 739463 ) on Friday December 13, 2019 @04:23AM (#59515248)

      Indeed. Intelligence is NOT, first and foremost, a means towards specialization. It is a means towards GENERALIZATION. Because humans are intelligent we can live in both the Congo Rainforest and the Arctic icepack. Intelligence allows so to be generalists.

      A beaver is perfectly adapted to its niche. They build sophisticated dams. They are specialists. But when scientists hand raised beaver kits, with no contact with other beavers, and then put them in a suitable stream, the beavers successfully built a dam on the very first try. It wasn't intelligence at all. Just pure instinct.

      • by davide marney ( 231845 ) on Friday December 13, 2019 @06:45AM (#59515392) Journal

        I was going to make the same point. Perhaps it should be stated slightly differently: general intelligence is the ability to specialize depending on the problem being solved. Living in a rainforest and on an icepack both require very specialized skills. No human is born knowing how to do either, but nearly ever human could learn. Instinct, on the other hand, is the ability to apply an innate skill to a problem.

        All of these are forms of intelligence. It's a spectrum, not a single point.

      • So humans specialize in generalizing.

  • Ranking the intelligence of animals seems an increasingly pointless exercise when one considers the really important thing: how well that animal is adapted to its niche.
    • by timeOday ( 582209 ) on Friday December 13, 2019 @01:24AM (#59515088)
      Then I propose defining intelligence by the size of the niche to which that species can adapt.
      • by quenda ( 644621 )

        Then I propose defining intelligence by the size of the niche to which that species can adapt.

        I for one welcome our new ant overlords.

        • I for one welcome our new ant overlords.

          Desert ants can't survive in a forest. Ants adapted to a rainforest canopy can't survive on the forest floor.

          There are 12,000 species of ants. None of them has a particularly large niche.

        • What about Ant-Man overlords? I've heard they adapt their size even better.
    • Also, ranking the competence of editors seems an increasingly pointless exercise when one considers the really important thing: how well each editor is doing his/her job, because ranking the competence of editors seems an increasingly pointless exercise when one considers the really important thing: how well each editor is doing his/her job.
  • Crows are indeed noted for their bird-brain intelligence. But I think that the octopus is probably way smarter, possibly even as intelligent as a dolphin. Part of that may be that the octopus has an ability that crows and dolphins lack; the ability to manipulate their environment.

    • If they could somehow evolve not to die after they reproduce they could have some real potential.
  • What is wrong with hammering nails with a spanner? Provided that is a shifting/adjustable spanner. And hammers will remove a nut if used hard enough.

  • Crow's tiny brain (Score:5, Insightful)

    by aberglas ( 991072 ) on Friday December 13, 2019 @01:43AM (#59515110)

    What is surprising is the tiny size of a bird's brain, given its intelligence. A bird's brain obviously has to be small for it to fly, but the intelligence is still there.

    A whale has a huge brain but is probably no more intelligent than a crow. The whale has a huge brain because it can, so a larger brain is advantageous even if it only produces a minimal increase in intelligence.

    Software is much the same. When memory was tight, powerful systems could be implemented in a few megabytes. But today, gigabytes of bloat upon layer and layers of abstractions, hacks, patches and work arrounds is fine. Because memory is cheap.

    • by quenda ( 644621 )

      What is surprising is the tiny size of a bird's brain, given its intelligence.

      The brain size limits the kind of intelligence. For example a huge amount of the human brain is devoted to spatial intelligence - converting the signals from our retina into a 3D model of the space around us. Cetaceans may use their large brains to do similar with sonar. Crows small brains do not allow this - their vision is very limited in comparison.

    • A whale has a huge brain but is probably no more intelligent than a crow.

      Whale brains are larger than humans, but they have fewer neurons.

    • Re:Crow's tiny brain (Score:5, Informative)

      by ortholattice ( 175065 ) on Friday December 13, 2019 @09:51AM (#59515636)
      The neurons in bird brains are much more densely packed than in mammalian brains. This presumably evolved as a necessity to achieve light weight for flight. See Bird Brains Have as Many Neurons as Some Primates [scientificamerican.com]
    • Re:Crow's tiny brain (Score:5, Interesting)

      by CheeseyDJ ( 800272 ) on Friday December 13, 2019 @10:07AM (#59515684)

      What is surprising is the tiny size of a bird's brain, given its intelligence.

      I was reading about jumping spiders the other day. They're completely awesome.

      They've been observed spotting prey in a different bush to the one they're sat in, before climbing all the way down their bush, walking across the ground to the other bush, then climbing all the way up the other bush to ambush the prey, all while staying hidden from the prey's view.

      Consider the visual acuity, spatial awareness, memory, and planning skills required to do that, and then realise that the jumping spider's entire body is only a few millimetres long. Its brain is absolutely minuscule. Right now we have no way of explaining how this is possible. I love things like that.

    • The thing about whales (from what I've heard) is that they kind of have a 2nd visual system with high-precision echolocation that they have to interpret. Birds have sensitivity to magnetism, but that seems kind of baked into their visual system.

  • by RyanFenton ( 230700 ) on Friday December 13, 2019 @01:44AM (#59515112)

    Corvids (crows and closely related birds) are a long-time favorite of experimenters in term of animal intelligence. They certainly are quite clever, according to test after test.

    And I wouldn't count my anecdote as worth anything compared to a larger body of research.

    But in terms of dynamic intelligence, the domestic African Grey Parrots I've encountered have had the same level of puzzle solving, plus constantly life-long acquired language skills, and cooperation skills like I wouldn't expect.

    The parrots we have will imitate phone conversations between eachother, will offer dogs treats (or tell them to be quiet if they're being noisy), then throw them the treat in exchange for tricks, and will constantly solve puzzles to both trick us and get access to resources.

    They also do a lot of tool use and clever object manipulation - but I can see that as a bit less dynamic than corvids in some cases - though most of that is socially learned rather than truly dynamic in some cases for Corvids. I haven't seen our African Greys use tools to reach things so often.

    They don't just learn words, but also context, application, and variance, both in tone and in words that can go into a phrase. Not perfectly of course - but in a very bird-like way, just enough to manipulate others into getting something done for them.

    Again though - that's my bias, but I think if African Grey Parrots were more available for research, you'd see a lot more results highlighting those results.

    Ryan Fenton

    • These same researchers also studied Kea (New Zealand mountain parrots) along with the New Caledonian crow. Both birds save the same puzzles but in slightly different ways. The Kea, which is a larger bird with a very strong beak, is more likely to use brute force first, resorting to tools only when that doesn't work. There are also videos of them learning to use humans as tools, putting nuts next to a person and tugging on their boot followed by gently tapping the nut with their beak, when they are perfectly

    • by OzPeter ( 195038 )

      just enough to manipulate others into getting something done for them.

      So they're like winged cats then?

      • Kind of. Ours actually do meow when they want to be cute. And bark - actually, they really like to do that pre-howl whine to get the dogs howling too. They're kind of trilingual, plus all the bird noises they hear from the nearby forest.

        They're not as focused on pushing stuff off tables, but they'll do that too. Plus they do like a good head scratch. So sure - winged cats that talk and stuff.

        Ryan Fenton

  • You wouldn't use a spanner to hammer in a nail, would you?

    Actually, if the spanner is big enough...

  • They still canâ(TM)t learn to fly underwater.

  • by Qbertino ( 265505 ) <moiraNO@SPAMmodparlor.com> on Friday December 13, 2019 @05:07AM (#59515300)

    Watching YouTube videos of crows playing confirms this IMHO. One particular video shows a crow repeatedly riding sleigh with a can-lid on a snowy rooftop. The bird grabs the lid with it's beak, walks up the roof, puts down the lid, hops on top and starts slinging down the roof, spreading it's wings for balance. Once at the bottom the crows repeats all that, two or three times. It's absolutely amazing to watch a creature other than a human or homilis mammal to be engaged in complex play like that. You see the birds limitations due to its limbs but the intent is totally obvious.

    • See any of crows mourning their dead? They do! Most, if not all, of the Corvids do.
      • See any of crows mourning their dead? They do! Most, if not all, of the Corvids do.

        So what? I've seen a squirrel looking frantic at another dead squirrel.

    • I was out bird hunting long ago, and heard a shot from one of my companions. He had (for reasons still unknown) shot a crow, and it landed on my side of a canal that was too deep and wide to ford. Being the only person on that side, and seeing the wounded bird (he had been hit in the wing), I had to go finish it off so it wouldn't suffer unduly. This bird saw me coming, and immediately left the grassy area, ducking into a copse of small trees. He couldn't fly, but could still move on the ground fairly w

    • Crow riding sleigh. [youtube.com] .. Ok, it flies up. Didn't recall that correctly.

  • Experiments showed that crows found the stems they desired even when they had been disguised with leaves from a different plant species. This suggested that the birds were selecting a kind of material for their tools that they knew was just right for the job.

    Or they have much better noses and those stems smell like a beacon in the night.

    Our pathetic noses make us live in a visual world. We laugh at a dog or cat that stares at a wall or door from an inch away, but they're sitting there like Supergirl hearing and sniffing with X-ray ears and noses looking right through it.

    • Most birds have a quite poor sense of smell. There are exceptions to this. Kiwi, vultures, some seabirds. But as a general rule, bird sense of smell is present but much less developed than you'd find in a typical mammal. They do generally have excellent color vision though - almost all mammal species have little ability to distinguish colors, with primates being a very notable exception.

    • by flink ( 18449 )

      Our sense of smell is actually pretty good. Humans are better than dogs at detecting some odorants, particular plant-based ones, which makes sense given our respective heritages. We just tend to pay much less attention to our sense of smell than sight and we have much less rich language to describe smells than sights or sounds. Also, since we started walking upright, our noses are way up in the air away from a lot of the interesting smells, so they get utilized less than they would if we spent all our ti

  • How the Counting Crows singer banged all those hot chicks in the 90s? Did he invent negging?
    • Make music that's popular with women, and no matter how you look, they'll climb over each other to get into your bed. Just look at any of the Rolling Stones.
  • Ranking the intelligence of animals seems an increasingly pointless exercise when one considers the really important thing: how well that animal is adapted to its niche. Intelligence is, first and foremost, a means towards specialization.

    Well, yeah.

    People like to argue about, say, how they think cats are dumb. I always rely "well, they are very smart at being cats."

    • They've developed the same highly effective survival strategy that dogs have - looking at us with big cute eyes until we solve their problems. Which in the case of cats seems to mostly revolve around moving things for them. Moving a door out of their way, moving food in front of them, moving hands across their fur...

      My cat is quite skilled in getting us to solve her problems.

  • Sometimes you have to work with what's at hand, even if its not the ideal tool. I don't know what that means for my intellect vs. that of a crow, but I've used a variety of metal objects to hammer nails.
  • Why can't any animal other than humans be taught to read well enough to read something not previously known to them and follow the instructions on how to do it, achieving reliable success that otherwise would have been anywhere from sheer luck to vanishingly improbable.
  • Ranking the intelligence of animals seems an increasingly pointless exercise when one considers the really important thing: how well that animal is adapted to its niche.

    Then maybe what we should be looking at instead is, how broad is that niche? For humans, that "niche" appears to pretty much the entire landmass of the planet...

    • Then maybe what we should be looking at instead is, how broad is that niche? For humans, that "niche" appears to pretty much the entire landmass of the planet...

      Not just the landmass. [conradmaldives.com] Actual photograph, not a rendering.

  • See https://www.amazon.com/Those-C... [amazon.com], based on the author's observations.

  • How do you tell the difference between ravens and crows?
    The long straight tail feathers on these birds are called pinions. Crows are known to have 7 pinions, while ravens have 8.
    So the difference between a raven and a crow is a matter of a pinion.

    Also, did you know when you see a murder of crows, nobody dies?
    That's because a group of crows is called a murder.
    Well, technically it's only a murder if there's probable caws.

  • "[Crows] have instead evolved densely packed clusters of neurons that afford them similar mental prowess. The specific kind of brain they have doesn't really matter"

    It does matter. The crow/bird model of brain may in many respects be a better choice to model AI after than the human brain because it is far more dense and efficient.

  • A whole parallel world of cognition that interacts with ours. Ordinary and spooky simultaneously.

  • I once observed a common blue jay, a member of the crow family, find an acorn in my back yard and push it down into the lawn grass then pick up a leaf and cover the acorn while tapping the leaf down over the spot. This seems the blue jay was protecting his saved food for later. This is not just response to an immediate need but planning for the future. I sure wish I had a camera with video capability handy at the time.
  • You wouldn't use a spanner to hammer in a nail, would you?

    I would (and have done) if no hammer is available.

On the eighth day, God created FORTRAN.

Working...