The population of monarch butterflies has decreased by 99%


The Western Butterfly was once a popular butterfly and is thought to have declined by 1.6 percent annually since 1980.

According to a report published in the international scientific journal Science, 450 different species of butterflies have been surveyed and found that the population of Western monarch butterflies has decreased by 99.9 since 1980. “A few years ago, the population of monarch butterflies was in the millions, and now a total of 2,000 have been noted,” said research scientist Katie Prodic, of the University of Arizona.