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  • A promising start to monarch butterfly counting season - planetcirculate

    A promising start to monarch butterfly counting season


    PACIFIC GROVE — Flashes of orange and black fluttering among the eucalyptus tree branches are once again enrapturing visitors to the Monarch Grove Sanctuary.

    The iconic monarch butterflies are back and researchers are hoping there will be more to count than last year when the endangered species reversed the downward trending numbers.

    “I hope that this number will continue to increase. We can’t say for certain because this is an endangered species,” said Natalie Johnston, the volunteer and community science coordinator of the Pacific Grove Museum of Natural History.

    The butterflies are starting to return to the Monarch Grove Sanctuary much to the delight of visitors. (Brian Phan — Herald Correspondent) 

    As it was for humans, 2020 was a challenging year for monarchs. That year fewer than 2,000 were counted along the West Coast from Mendocino County to Baja California from November through early March when they normally overwinter and congregate in clusters. The following year, the butterflies had a comeback with over 250,000 monarchs counted.

    On Oct. 21, the Pacific Grove Natural History Museum counted over 3,800 butterflies. On the same day in 2021, they counted only 2,593 (on their way to over 250,000).

    “It looks like it looks like the monarch sanctuary and the monarchs themselves continue to be very inspiring,” said Johnston.

    The peak population at the overwintering sites are traditionally around late November. With the large numbers of butterflies seen at the sanctuary this early in the season, it gives researchers hope that it might be an even more successful year.

    The western monarch population has declined since the official count of 1.2 million in 1997. This year, the migratory monarch butterfly is now classified as “endangered” by the International Union for Conservation of Nature.

    “Monarchs are also very important culturally. They are often seen as symbols of transformation, as symbols of perseverance for the way they migrate,” said Johnston. “And in 2021, they were also seen as a symbol that life can go on after 2020.”

    The annual Xerces Western Monarch Thanksgiving Count allows researchers such as  Emma Pelton, a senior conservation biologist with Xerces Society for Invertebrate Conservation, and volunteers, to count monarch butterflies all along the West Coast. Tallying up all the counts from hundreds of different sites allows them to understand the population’s health.

    So far, the numbers have been promising, but for Pelton, she knows there is more work to be done.

    “I think what we are seeing so far is that we’ve had good numbers in October, which always bodes well for the overwintering season,” said Pelton.

    It’s a good sign that the butterflies are bouncing back but only in contrast to the last couple of years.

    Pelton said that the year-to-year data gets the headlines, and of course, everyone’s interested, but the true story of how these populations are doing shows when looking over a more extended time period.

    Some 95% of the western population was estimated to have declined since the 1990s.

    “So the bounces from one year to the next might look huge, but relatively, we’re just bouncing around near the bottom of their populations,” said Pelton. “But there’s still hope that if we do the work, they can bounce back and persist.”

    One of the best ways to help according to Pelton is to continue to plant native plants and report if there are clusters of monarch butterflies on your property to The Xerces Society for Invertebrate Conservation (https://xerces.org/).

    “If you ever see clusters, tell us. We get new overwintering sites reported all the time,” said Pelton. “We just had someone who contacted us, and she has 1,000 butterflies on her property. Monarchs … sometimes pop up in unexpected places. So please contact us if you have clustering butterflies.”



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