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Bug Science

We Can Now Track Individual Monarch Butterflies (nytimes.com) 48

An anonymous reader quotes a report from the New York Times: For the first time, scientists are tracking the migration of monarch butterflies across much of North America, actively monitoring individual insects on journeys from as far away as Ontario all the way to their overwintering colonies in central Mexico. This long-sought achievement could provide crucial insights into the poorly understood life cycles of hundreds of species of butterflies, bees and other flying insects at a time when many are in steep decline.

The breakthrough is the result of a tiny solar-powered radio tag that weighs just 60 milligrams and sells for $200. Researchers have tagged more than 400 monarchs this year and are now following their journeys on a cellphone app created by the New Jersey-based company that makes the tags, Cellular Tracking Technologies. Most monarchs weigh 500 to 600 milligrams, so each tag-bearing migrator making the transcontinental journey is, by weight, equivalent to a half-raisin carrying three uncooked grains of rice.

Researchers are tracking more than 400 tagged monarch butterflies as they fly toward winter colonies in central Mexico. The maps [in the article] follow six butterflies. [...] Tracking the world's most famous insect migration may also have a big social impact, with monarch lovers able to follow the progress of individual butterflies on the free app, called Project Monarch Science. Many of the butterflies are flying over cities and suburbs where pollinator gardens are increasingly popular. Some tracks could even lead to the discovery of new winter hideaways.
"There's nothing that's not amazing about this," said Cheryl Schultz, a butterfly scientist at Washington State University and the senior author of a recent study documenting a 22 percent drop in butterfly abundance in North America over a recent 20-year period. "Now we will have answers that could help us turn the tide for these bugs."
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We Can Now Track Individual Monarch Butterflies

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  • Butterflies Aren't Real

  • by XaXXon ( 202882 ) <xaxxon@g[ ]l.com ['mai' in gap]> on Tuesday November 18, 2025 @12:22AM (#65801989) Homepage

    > by weight, equivalent to a half-raisin carrying three uncooked grains of rice.

    wtf?

    • by Lproven ( 6030 )

      Exactly. Came here to say this. I suspect a bunch of people didn't edit or proof this and the originator is a lazy thief and used an LLM bot.

      20mg tracker on a 600mg butterfly? Why not say it's a 60kg person carrying a 2kg backpack? That's meaningful and it's not much at all.

    • ...but you can't make us understand the metric system.

      BTW, what is the average airspeed velocity of an unladen monarch butterfly? In furlongs per fortnight, please.

      • ...but you can't make us understand the metric system.

        BTW, what is the average airspeed velocity of an unladen monarch butterfly? In furlongs per fortnight, please.

        How odd. I haven't had a non-metric car since the late 80's. My whole shop is metric. I work in metric. So many of us here in the USA do.

        But I also have the old school tools as well. I make parts on my metric lathe that are measured in inches. I make parts that are metric on one side and standard on the other.

        Getting a rageboner about this whole thing is silly, It is just different sizes. But it seems to enrage some eurocentrics.

        And acting like Americans are stupid isn't much of a flex when you ca

        • You left out....

          How wonderful it is to have multiple languages, yet somehow not so wonderful not to have multiple measurement systems.

          Honestly. I don't understand why the rest of the world goes all apeshit about how things in the U.S. are measured. I mean, who fucking cares? Hell, I LIVE HERE and don't fucking care.

          • You left out....

            How wonderful it is to have multiple languages, yet somehow not so wonderful not to have multiple measurement systems.

            Honestly. I don't understand why the rest of the world goes all apeshit about how things in the U.S. are measured. I mean, who fucking cares? Hell, I LIVE HERE and don't fucking care.

            Here is the place to watch them go nuclear, a European physicist telling the truth about our superiors,

            https://www.youtube.com/watch?... [youtube.com].

            Oh heck - I'm here Q. what is the difference between countries that use Metric and US type measurements? A. One of them landed men on the moon, and returned them. The other never did.

            Oh heck - did they know, the Metre, the standard of the universe, is measured by a fraction? Not even an SI unit, but a fraction. I'll be at -1 troll any moment now - the Truth u

      • ...but you can't make us understand the metric system.

        BTW, what is the average airspeed velocity of an unladen monarch butterfly? In furlongs per fortnight, please.

        Canada officially adopted the metric system 55 years ago. We still use both imperial and metric in daily lives. Ask a person of their height or weight, many will respond with feet, inches, and pounds. Long distances may be described in miles or kilometers. Certain items such as drill bits are almost exclusively in fractions of an inch. Temperature is in Celsius but we intuitively understand Fahrenheit. Volumes are in litres but we're somewhat comfortable with pints and cups. Gallons get a bit murky because

    • by Striek ( 1811980 )

      My thoughts exactly.

      They should have said it was the equivalent of 0.00005 basketballs floating on top of 0.0000004 Olympic-sized swimming pools. Much easier to understand.

    • > by weight, equivalent to a half-raisin carrying three uncooked grains of rice.

      wtf?

      Somebody took a LOOOOOOOOOOOONG toke on the bong before writing that up.

    • by msauve ( 701917 )
      >wtf?

      Really. The proper comparison is the Library of Congress carrying the New York Public library.
  • Not who or what I would choose to track, but whatever floats your boat I guess.

    • Not who or what I would choose to track, but whatever floats your boat I guess.

      In my area, the number of monarchs has been crazy this year compared to the last few. As an amateur nature photographer, it's been quite fun. While I'm not an expert in the field and can't say exactly how this information will help butterfly research, it's still pretty impressive for both naturalism and technology.

      Also better butterflies than people, if they're tracking anyone against their wills.

  • by Tony Isaac ( 1301187 ) on Tuesday November 18, 2025 @01:19AM (#65802045) Homepage

    Here's a better way to visualize the weight.

    The tag weighs about 1/10 the weight of the butterfly. So in human terms, it would be like carrying around a Thanksgiving turkey, or a couple of gallons of milk.

    It will be interesting to see if these transmitters alter the flight of these butterflies.

    • by votsalo ( 5723036 ) on Tuesday November 18, 2025 @03:58AM (#65802181)

      Insects are a lot stronger than humans, relative to their weight. This may be simply because of the size difference or a combination of size and materials. If you double the size of a butterfly, its weight will increase by a factor of 8, but the surface of its wings will increase only by a factor of 4.

      Using a visualization of raisins and grains of rice is better than using humans. A picture of the device attached on a butterfly might be even better.

      I just put a bunch of raisins on my kitchen scale, and they average 200 mg each, so Jonathan's raisins must be about six times bigger than mine. I'll weigh my grains of rice later.

      • RTFM for a pic of a tagged butterfly.
      • by SpzToid ( 869795 )

        Insects are a lot stronger than humans, relative to their weight. This may be simply because of the size difference or a combination of size and materials.
        If you double the size of a butterfly, its weight will increase by a factor of 8, but the surface of its wings will increase only by a factor of 4.

        Using a visualization of raisins and grains of rice is better than using humans. A picture of the device attached on a butterfly might be even better.

        I just put a bunch of raisins on my kitchen scale, and they average 200 mg each, so Jonathan's raisins must be about six times bigger than mine. I'll weigh my grains of rice later.

        How many fractions of a Library of Congress are we actually talking about?

      • While it's true that insects are very strong relative to their weight, this "enormous" strength applies to weight being lifted while on the ground. For example, while ants can carry up to 50 times their body weight, https://www.terminix.com/ants/... [terminix.com]. bumblebees can only carry up to 80% of their body weight while flying. https://www.ucdavis.edu/curios... [ucdavis.edu]

        I don't know exactly how that translates to butterflies, or whether that 60 mg radio tag will be a problem for them while flying. But it still would require

        • It must surely matter how the weight is attached and distributed too, I'm sure a bee could not carry 80% of its weight as a point load on one leg. The adhesive might also mess with the animal.

          I suspect all the scientists will find out is that 3 grains of rice are enough to mess with the flight dynamics of a monarch butterfly. If it was no big deal I suspect nature would have already made the butterflies bigger

      • by xpyr ( 743763 )
        There is if you click on the new york times article link. It's the first thing you see before the article starts.
  • if I stuck a tracker to your arse? Oh, wait. We already have oir mobiles on us all the time...

    • if I stuck a tracker to your arse? Oh, wait. We already have oir mobiles on us all the time...

      Better a tracker than a cam. Nobody needs to see that shit.

  • When sat-nav data all correlated to a road stop near the San Ysidro boarder. Upon further investigation, all the butterflies were amassed on a single windshield of a stopped 18-wheeler.

    Said one particular study author," this new technology is so impactful! We were so worried the additional mass might alter the future ef.s ...t s all living .. D34r . g0D!! . . ."
    " ##85 & & crtl *"
    NO CARRIER
  • Butterflies are one thing, but this means anybody with a few $ can invisibly track anybody else.
  • Individual monarchs are cool, but I'd really like tracking for the swarm. Witnessing the monarch migration is something people should experience.

  • If you put on an extra 10% of your weight, how do you think that would affect your ability to run a marathon?

  • They are just practicing on butterflies. You are next!
    #QANON

  • The only way to assure that you're not tracked is to make it so no one will want to track you

Faith may be defined briefly as an illogical belief in the occurence of the improbable. - H. L. Mencken

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