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The number of monarch butterflies spending the winter in the western United States has dropped to its second-lowest mark in ...

Monarch butterflies in the western U.S. have dropped to just 9,119 this year. In 2023, the count was 233,394, meaning a 96% decline.

Just over 9,000 monarchs were counted in California last winter, the second lowest ever since the annual count began in 1997 ...