San Francisco – Researchers with an environmental group labeled the number of butterflies in the coastal shores of the California coast as "dangerously low".
More than 30,000 butterflies have been reported in recent calculations by Zeris Society, which have reduced 86 percent from 2017.
Comparatively, in 1981, the group counted more than 1 million western kings in the winter in California, as noted by San Francisco Chronicle.
Zaris Society organizes annual Thanksgiving and New Year calculations and was not sure what was the reason for reducing the numbers. It states that there is no evidence of deferred migration and butterflies have not been reported in other parts of the country.
A study of the 2017 study by researchers from Washington State University has found that in the next few decades, these species may become extinct if they have not done anything to save them.
Scientists say that butterflies are threatened with destruction of pesticides, herbsides and their transit path. They also have noticed the effects of weather change.
Researchers at the University of Michigan and Stanford University have reduced carbon dioxide from car and factory exhaust to natural toxicity in milkweed, which caterpillars use to fight parasites.
Western Monarch butterflies are usually found in forested forests on the banks of California from November to March.