By Alicia Graef
While international efforts are underway to help keep dwindling populations of monarch butterflies from disappearing, scientists are raising concerns about how severe weather and a loss of forest habitat at their wintering grounds in Mexico are affecting them.
Every year, monarchs embark on an epic multigenerational migration that takes them thousands of miles from Canada and the U.S. in search of sites in California and Mexico. The fir trees in the southern regions offer the shelter and warmth they need to survive the winter.
Unfortunately, these vital forests in Mexico have been threatened by illegal logging and now storms have destroyed hundreds of acres of habitat, while severe weather is believed to have killed an estimated 6.2 million of these iconic butterflies.
"Since the forests provide the microclimate needed for butterflies to survive the winter, illegal logging must be eradicated and degraded areas need to be restored," Omar Vidal, CEO of World Wildlife Fund (WWF) Mexico, said. "This would help the monarch butterfly to better adapt to extreme climate events and also provide local communities with sustainable economic alternatives."
These fragile butterflies already face high mortality rates along their route from other threats that range from predators and parasites to a loss of habitat along their migration path. They travel north in the spring in search of milkweed plants—the only plant that monarchs lay eggs on and caterpillars eat. But these plants are being destroyed by the herbicide glyphosate, which is sprayed on fields where genetically modified Roundup-ready corn and soy crops are grown.
Holding Monsanto Accountable for Growing Public Outcry Over the Dangers of Glyphosate - EcoWatch https://t.co/EboABDmPnQ @GMWatch @gmo917— EcoWatch (@EcoWatch)1471556108.0
According to the Xerces Society, in the 1990s, an estimated one billion monarchs made this migration, but over the past 15 years, they've lost millions of acres of habitat and the number of monarchs has steadily dropped by 80 percent or more by some estimates.
The good news is that these butterflies are not without advocates working to help them recover. Individuals are working in their gardens and communities to improve butterfly habitat. Conservation organizations are working on other measures, including seeking endangered species status for monarchs and working on habitat restoration.
Farmers Key to Bringing Monarch Butterflies Back From the Brink of Extinction https://t.co/lJIOFtgYut @globalactplan @foeeurope— EcoWatch (@EcoWatch)1455712520.0
The National Fish and Wildlife Foundation recently announced more than $3 million in grants from its Monarch Butterfly Conservation Fund, which were matched for a total of $9 million, will be used to restore approximately 16,000 acres of key habitat to support monarchs' survival.
For more information about ways to get involved in efforts to save monarchs that include creating habitat or participating in citizen science projects, visit the U.S. Fish and Wildlife Service's Save the Monarch and the Monarch Joint Venture.
This article was reposted with permission from our media associate Care2.
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A monarch butterfly caterpillar feeds on common milkweed on Poplar Island in Maryland. Photo: Will Parson/Chesapeake Bay Program, (CC BY-NC 2.0)