Californias Monarch butterfly population hits ‘potentially catastrophic’ low in 2018

California’s Monarch butterfly population hit a record low in 2018 after dropping a whopping 86 percent from the previous year. According to the Xerces Society for Invertebrate Conservation, the total population has declined 97 percent since the 1980s, but this latest one year drop is “potentially catastrophic.” In the western part of the United States, monarchs migrate to California for the winter, traveling from Idaho and Utah. In 2017, the traditional California coastal sites like Pismo Beach, Big Sur and Pacific Grove hosted about 148,000 monarchs, but in 2018, volunteers counted approximately 20,500.

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