LOSS OF HABITAT, THE USE OF PESTICIDES AND HERBICIDES, AND CLIMATE CHANGE ARE HAVING A PROFOUNDLY NEGATIVE IMPACT ON THE BUTTERFLIES

It’s not just Mexico’s forests that need protecting for butterfly migration

Their route from Canada is threatened by overuse of herbicides and climate change, among other factors

Mexico, the United States and Canada must share responsibility for the conservation of the monarch butterfly, according to a biologist who warns that the insect’s North American migratory path is at risk of becoming a thing of the past.

Víctor Sánchez-Cordero, a researcher at the National Autonomous University’s Institute of Biology and Mexico’s lead representative on a tri-national scientific committee that studies the monarch, said that the butterflies’ route from southeastern Canada to the fir tree forests of Michoacán and México state is under threat.

He blames the excessive use of herbicides, changes in the way land is used, climate change and a reduction in the availability of nectar and pollen.

“The commitment to conserve this migratory phenomenon not only focuses on Mexico; it’s a shared responsibility between our country, Canada and the United States,” Sánchez-Cordero said.

The researcher, who along with his team developed a system to monitor the migration of the monarch, said that there is a misconception that the most important – almost exclusive – factor in ensuring the continuation of the phenomenon is the conservation of forests in the Monarch Butterfly Biosphere Reserve (RBMM), located about 100 kilometers northwest of Mexico City.

That idea “has placed great international pressure on Mexico,” Sánchez-Cordero said before adding that he and his team published an article in the journal Frontiers in Environmental Science that shows that the decline in the number of monarch butterflies migrating to Mexico is not due to deforestation in the RBMM.

Deforestation has been drastically reduced in the past 10 years but butterfly numbers have continued to decline, he said.

“The dramatic reduction in the density of monarch butterflies that arrive at overwintering sites in Mexico doesn’t correlate with the loss of forest coverage, which shows that this factor is not responsible for the population reduction. … Other hypotheses to explain the decrease must be sought,” Sánchez-Cordero said.

One possible cause for the decline, he explained, is that the excessive use of herbicides is killing milkweed, a plant that is a main food source for monarch butterflies and on which females lay their eggs. Less nectar and pollen in the United States and Canada as a result of deforestation is another possible cause, Sánchez-Cordero said.

He added that large numbers of migrating butterflies have perished in Texas and the northeast of Mexico due to drought linked to climate change.

To conserve the migratory phenomenon of the monarch – butterflies fly some 4,500 kilometers to reach Mexican forests from Canada over the course of three to four generations – a network of conservation areas along their migration routes needs to be developed, Sánchez-Cordero said. He also said that the routes followed by the butterflies should be declared protected areas.

“A new conservation paradigm is needed. … It’s something that we [Mexico, the United States and Canada] should build together,” the researcher said.
Monarch Butterfly Seaside Habitat

SAFE GUARDING THE BUTTERFLIES: FILM INTERVIEW WITH JOEL MORENO ROJAS AND ELLEN SHARP FOUNDERS OF THE BUTTERFLIES AND THEIR PEOPLE PROJECT

In March I had the tremendous joy of interviewing Ellen Sharp and Joel Moreno Rojas, founders of the nonprofit organization “The Butterflies and Their People Project.” We filmed the interview from the rooftop of their hotel, JM Butterfly B&B, which is located at the base of Cerro Pelon Monarch Butterfly Reserve in Macheros, Mexico. Cerro Pelon is the old volcanic mountain where the Monarchs wintering home was first located by Mexican citizen scientist Catalina Aguado Trail, on January 2, 1975.  Trail was at the time working under the direction of zoologist Doctor Fred Urquhart of the University of Toronto.

Joel and Ellen are simply an amazing dynamic duo. They have built a beautiful and welcoming bed and breakfast at Cerro Pelon, the most pristine and least trafficked of Monarch sanctuaries. Largely through the conservation efforts of The Butterflies and Their People Project they have helped provide economic opportunities that have in turn dramatically reduced illegal logging and deforestation of the core protected areas of the forest.

The mission of The Butterflies and Their People Project is to “preserve the butterfly sanctuary by creating jobs for local people in forest and monarch butterfly conservation. The Butterflies & Their People Project is an Asociación Civil (non-profit organization) registered and located in the village of Macheros in the State of Mexico.”

I hope you’ll watch and will be equally as enamored of Joel and Ellen as were we. You’ll learn more about how The Butterflies and Their People Project came to be, the importance of protecting the existing Monarch Butterfly forest sanctuaries, and how jobs and economic growth go hand and hand with protecting the vitally important temperate forests of the Monarch Butterfly Biosphere Reserve.  And a bit about how this extraordinary couple met and began their journey in Monarch conservation.

To learn more about The Butterflies and Their People Project visit their website.

To donate to The Butterflies and Their People Go Fund Me fundraiser click here.

To learn more about and make a reservation at  JM Butterfly B and B click here.