The monarch butterflies may vanish from the summer days a few decades from now. The study shows that there is a sharp dwindling in the population of wandering monarchs in the West. Cheryl Schultz, an associate professor at Washington State University Vancouver and lead author of the study said that the study not only shows the decline of monarchs since 35 years ago but also if this trend continues western monarchs may have disappeared completely from the surface of the earth in another 35 years.

The study reveals that 72 percent that is not many monarchs will be wandering in the West in 20 years to carry the population. Eastern Monarchs are also in the danger of extinction. The study led by Schultz showed that western monarchs are performing worse than monarchs in the East. Western Monarchs that procreate in Washington, Oregon, Idaho, Nevada and California migrate south for the winters to perch in clusters on eucalyptus and pine along the California coast.

Those coastal inhabitants began perceiving in the 1990s that there are only a few Monarchs left as compared to previous decades. Many volunteers rendered their services towards collecting data to learn more in an annual Thanksgiving count of hundreds of California roosting sites in 1997. This data proved to be an initiative for the new study.

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Schultz utilized novel statistical techniques to merge Xerces Society’s Thanksgiving Count data from 1997 to 2006 with more scarce data accumulated by amateurs and professionals back to the early 1980s. The study found that there were 10 million Monarch butterflies spending their winters on the California coast whereas now there are only 300,000 monarch butterflies are considered to roost across hundreds of coastal sites.