It looks that way according to a study by the Xerces Society for Invertebrate Conservation, a nonprofit group that conducts a yearly census of the western monarch. Their study concluded that the population decreased by 86 percent from the previous year. This goes along with the fact that, since the 1980s, the total population has decreased 97 percent.
It looks that part of the problem is the decline in the availability of milkweed, the monarch's favorite food. This has happened because of pesticide use and urban development, as well as the droughts that have afected Calfornia since 2011.
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