Cover Image: September 2009 Scientific American Magazine See Inside

More Animals Seem to Have Some Ability to Count

Counting may be innate in many species















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Irene Pepperberg of the Massachusetts Institute of Technology, famous for her 30-year work with Alex the parrot, says that even bees can learn to discriminate among small quantities. “So some degree of ‘number sense’ seems to be able to be learned even in invertebrates, and such learning is unlikely without some underlying neural architecture on which it is based,” she remarks.

Understanding the biological basis of number sense in animals could have relevance to people. According to Brannon, it may suggest to childhood educators that math, usually taught after age four or five, could actually be introduced earlier into the curriculum.

Note: This article was originally printed with the title, "Animals by the Numbers."



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ABOUT THE AUTHOR(S)

Michael Tennesen is a science writer based near Los Angeles.


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  1. 1. andreanis 03:39 PM 8/27/09

    this is really interesting...we often tend to anthropomorphise animal behavior,maybe because we have in the back of our mind always the magic of evolution (we consider them as inferior to us)..the reality is different : most animals probably have little time to count,being concerned with more basic things like dayly survival: am sure if they had all the necessary time they would learn even quite quickly (even trigonometrics !),like the horse of the article...

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  2. 2. Hiromi 01:28 AM 9/13/09

    This article was interesting because it re-built my reality about animals.
    Now, I'm curious about up to how many each species can count. :)

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  3. 3. Hiromi 01:29 AM 9/13/09

    This article was interesting because it re-built my reality about animals.
    Now, I'm curious about up to how many each species can count. :)

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  4. 4. Hiromi 01:30 AM 9/13/09

    This article was interesting because it re-built my reality about animals.
    Now, I'm curious about up to how many each species can count. :)

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  5. 5. crystalsinger in reply to Hiromi 09:55 AM 9/15/09

    Well, we know that Hiromi can count to three... ;-)

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  6. 6. drafter 10:51 AM 9/15/09

    How can I get paid to waste time and money determining if animals can count. I'm sorry but to what end, will they build us a rocket or solve a problem? no.

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  7. 7. CleoK 12:50 PM 9/15/09

    this is a surprise.. for years .. I've used a technique long known to photographers.. go into a blind with someone else.. the other person leaves..
    Once the 2nd person leaves, the birds flock back as if no one was in the blind.

    If I entered the blind alone.. the birds never came back.

    I was told this was because birds can NOT count.. and this trick even works if the other 'person' is a dog!

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  8. 8. MGavry 12:57 PM 9/15/09

    The time and moneys are spent in order to help combat the point of view you gave.
    What use is building a rocket to discover what's beyond our planet when we can't be bothered to understand or appreciate what is around us now? If we disregard the thoughts and understanding of the creatures around us, what are we to do with any we find elsewhere?
    Intelligence; consciousness is already quite varied given our limited knowledge on the subject. Go talk to someone who isn't neuro-typical about how they think.

    You've illustrated the problem this kind of research ultimately aims to solve.

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  9. 9. lotsocats100 03:47 PM 9/15/09

    can these monkeys do my statistics homework?

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  10. 10. lotsocats100 03:47 PM 9/15/09

    I'm wondering if the monkeys can do my statistics homework.

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  11. 11. Ungolythe 06:29 PM 9/15/09

    It is quite often that scientific research is done for the sake of knowledge itself and the fruits of this knowledge are sown later. A recent nobel prize winner won his prize on the research of why certain jellyfish glow. Besides making things glow how on earth could this help anyone? The truth is that he discovered a class of proteins that glow in ultraviolet light. We have been able to genetically modify animals so that they express this protein in certain ways. Beyond the cute glow in the dark mice we have been able to see finer details in brain structures by modifying certain types of cells to glow different colors. This has been immeasurably helpful in the study of the brain. This is only a small part of the benefits of this research but it illustrates the point.

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  12. 12. drafter in reply to Ungolythe 06:42 PM 9/15/09

    you know what "Ungolythe" your correct and I appreciate a non-snide response, sometimes I forget my manners.

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  13. 13. piggysmile 07:48 PM 9/16/09

    Animals that can count look cute to me.

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  14. 14. Laertes 09:41 AM 9/17/09

    There is a subtle difference between counting and recognizing a quantity of objects. Try pouring 5 pills out of a medicine bottle into the palm of your hand. You can recognize the 5 objects almost instantly without actually counting them. That is because there is a separate part of your brain that is gnetically wired to recognize quantities of objects up to 10 or so (guess why 10). This ability may be what is being demonstrated in test animals. The process of counting is fundamentally different. We do not recognize a quantity of objects. Rather we do a one-to-one comparison between the objects and a number sequence that we have learned. I have never heard of any animal doing that, but I would not be surprised if higher primates could be taught to count.

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  15. 15. thelma0102 01:01 PM 9/24/09

    i'm wondering if animals have other abilities believed to only belong to humans

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  16. 16. thelma0102 01:04 PM 9/24/09

    i want to know if animals have other abilities believed to only belong to humans
    what animals do the best in mathematic?

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  17. 17. Macrocompassion 09:53 AM 12/2/09

    Cats seem unable to count. A female with newly born blind babies having to transfer them and her place, will make a final journey to collect the uncounted and non-existant "last" kitten after all the actual ones have already been moved.

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  18. 18. taerog 03:58 PM 12/4/09

    "Cats seem unable to count" That may be different (too many variables to judge just that) . . it could be that they are fine with "spot" judging numbers of objects in a single view (ie this is more then that and that) but 2 different views at different times are not linked. Or they can't "count" to zero. infact zero is surprisingly hard consept as it can and often is considered "nothing" or non and thus has no relation to counting something since it does not exist. Or it could be that they can't remember a count well. again this is not surprising since internal verbalization helps us remember . . try to count to 10-20 by just saying "one".
    Managing the variables is the hardest element here and just about anything can be going on.

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  19. 19. Macrocompassion 02:13 AM 12/6/09

    The idea of a view not a count giving a stimulus for an animal's subsequent activity is valid. But obviously the view is different after the cat's kittens have been transferred to the new place. So when the mother cat views them she cannot be certain that they are all present compared to when her family was at its previous location. If she could count then she would have no need to make a final return journed to see if there are any remaining kittens that need to be transferred.

    Consequently it is logical to conclude that cats cannot count (or at least a mother cat who has recently given birth).

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  20. 20. taerog 11:43 AM 12/7/09

    I think you are missing the point. "counting" not only going 1 2 3 4 I have 4 as we do . . it is understanding when you have more or less and other even more subtle things. Knowing you have say 4-6 kittens (witch is a big number for most animals) and remembering it long term may really not be useful for the cat since there is the ease (physically and mentally) to do a final check and to be entirely sure all are moved and safe. safer to check then rely on counting. (only another possability)

    Also just because of these and other possibilities it is VERY hard to study any animal behavior. Concluding anything decisive by only a casual observation is a sure way to come to a bad conclusion. (so it is NOT logical at all since there is way too much assumption of modivation not controled for)

    Even monitor lizards have been capable to understand numbers of objects up to 6 . . so this is not even just a mammal and bird thing.

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