California’s Monarch Butterfly Population Collapses By 86% In One Year

Monarchs and honeybees near extinction. Due to Roundup, climate change or both?

peoples trust toronto

In 1981 the Xerces Society, a non-profit environmental organization that focuses on the conservation of invertebrates, counted more than 1 million Western Monarchs wintering throughout California.

The group’s most recent count, over Thanksgiving weekend, estimated 20,500 Western Monarchs in 2018, an 86% decline from the nearly 148,000 spotted the previous year, according to an annual census conducted by the Xerces Society, SFGate reported last Sunday.

Researchers with the conservation group called the number “disturbingly low” and potentially “catastrophic,” in a statement.

Monarch butterflies (Danaus plexippus plexippus) are the most well-known butterflies species in North America. The Western Monarch typically migrates to California each winter, and researchers for the conservation group count its population in the state each November.

“A ubiquitous sight in gardens, prairies, and natural areas from coast to coast, their arrival in northern states and Canadian provinces is viewed by many as a welcome sign of the change in seasons from spring to summer.


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10 thoughts on “California’s Monarch Butterfly Population Collapses By 86% In One Year

  1. “Monarchs and honeybees near extinction. Due to Roundup, climate change or both?”


    From the article:

    “Monarchs and honey bees are critical components of the food chain, and if massive die-offs continue, well, it could disrupt the food supply for humans.”

    …thus causing ‘humans’ to die-off which would be fitting payback for the cause of the demise of this planet’s innocent creatures; those not responsible for why they are dying off, are not responsible for spraying toxins all over the place and initiating climate change since we’ve got to drive everywhere. I’m including myself in this because I drive. Many people already live in ‘food deserts’ and cannot rely on public transportation to get them to where they can purchase food, nor can they show up at the few food banks still open and bring home groceries to cover them when their funds run out. Many people are already living devastated lives and the shit is only just hitting the fan.

    Liked by 2 people

    • You’re right, Shelby, it’s a very sad situation that the vast majority of us seem to have no ability to rectify. However I’m aware of the important work you do with your van transporting people to supermarkets and for other errands. I guess all we can do is look out for one another and try to hold out as long as we can.

      Liked by 1 person

  2. Pingback: California’s Monarch Butterfly Population Collapses By 86% In One Year | Worldtruth

  3. Oddly enough we do have monarchs here in New Zealand, Rosaliene, though I can’t access any information how they originally got here. As we’re surrounded by ocean, they don’t seem to participate in any annual migration – that I know of. We also have red admirals and cabbage butterflies (that eat my broccoli) but that’s about it.

    Liked by 1 person

    • It is from the neonicotinoids that stay in the environment for months.

      Most of the butterfly and bee kill off is from neonicotinoids like advantage . The stuff used enmasse by people, on their pets for fleas. They are also used at Wal-Mart and garden shops on starter plants for sale
      They are the culprits. They stay in the environment for months killing all insect larvae and eggs non selectively.
      They keep fleas away a full month!

      I do not hear you or any vets, telling the truth about this. No one wants to admit to inconvenient truths that really might have an effect

      Liked by 1 person

      • Any vets? You mean military vets, Nick? I’ve never been in the military and I have long campaigned for banning neonics as part of the NZ Green Party.

        However when there are numerous influences harming insects (Roundup, climate change, neonics), I’m not sure how you decide which factor is causing the most damage.


        • Veternarians in america make a lot of money on neonicotinoids treatments for animals. It is very big business. Probably as big a deal or bigger than some of the worst chemical company pharmaceutical Monsanto-type malfeasance. Glad u r doing that in NZ . Americans do not give a crap. Say one thing do another


          • I know neonics are the worse in america by professional experience as a toxicologist. Some shot just does not fly. They can say they are cutting neonics all the want or banning roundup but as long as chemical companies and people flood the environment here w new neonicotinoids and old like acetamiprid, clothianidin, imidacloprid, nitenpyram, nithiazine, thiacloprid and thiamethoxam advantage
            There is a direct link to insect kill off good and bad


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