[Animals] Western monarch butterfly numbers in California dropped by 30% last year, researchers say

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of the Rocky Mountains, another monarch po[CENSORED]tion travels from southern Canada and the northeastern United States to central Mexico. Scientists estimate that the monarch po[CENSORED]tion in the eastern U.S. has fallen by about 80% since the mid-1990s, but the drop-off in the western U.S. has been even steeper.

https://www.nbcnews.com/science/science-news/western-monarch-butterfly-numbers-california-dropped-30-last-year-rese-rcna136537