“In the current season, butterflies occupied 2.83 hectares in hibernation forests as opposed to the 6.05 hectares reported in 2018-2019,” says the report of an ecological investigation.
This year 11 colonies have been established in the hibernation period that is nearing its end, which the butterflies have been carrying out since last November and will end this March, in the forests of the mountainous central provinces of Michoacán and the State of Mexico, where the oyamel, a conifer in the pineapple family that offers the favorite food of orange and black butterflies.
Millions of butterflies come to Mexico from Canada through the United States during the boreal winter, in one of the most admirable migrations of the animal kingdom.
“Conserving your journey involves promoting new actions and not letting your guard down in the face of threats such as climate change, land use change and forest degradation”, indicates a WWW investigation that has a conservation program with the organization founded in 1961 Telmex Telcel, owned by magnate Carlos Slim.
Both institutions launched a call to “join civil society to plant flowering plants that butterflies can feed on and get enough energy to continue their journey.”
According to the study, lower temperatures During the spring of 2019 in the southern United States, compared to 2018, they delayed the reproduction and development of populations, including the migratory generation.
The ecological program that monitors this phenomenon of the animal kingdom has allowed 16.4 million trees to be planted on more than 14,500 hectares of the Monarch Butterfly Biosphere Reserve and its area of influence.
During the second half of December 2019, five colonies were detected on almost two and a half hectares within the aforementioned reserve.
Six more colonies were found strength of that protected area, in 0.4 hectares, according to researchers from the National Commission for Natural Protected Areas and the WWF alliance with the aforementioned private foundation, in coordination with local communities.
The largest colony it occupied 1.2 hectares in the Sierra Campanario sanctuary.
Jorge Rickards, CEO of WWF Mexico, explains that the temperatures “substantially lower in Texas” when the Monarchs arrived in March and April 2019, compared to the previous year, “determined a slow growth of the eggs and larvae of spring”.
As a consequence, there was “a reduction in the population of this insect throughout North America and consequently less occupation in Mexican forests.”
The current reduction of the population of Monarcas “not alarmingBut we must remain vigilant that it is not a trend in the coming years, “says Rickards.
The environmental organization has been measuring the forest area occupied by butterflies during their hibernation for more than 16 years and monitoring the forest conditions of the Monarch Butterfly Biosphere Reserve for 20 years.
The core area has more than 13,500 hectares of the more than 56,000 total in the biosphere reserve.
The WWF estimates that the forest “still preserves good conditions as a overwintering habitat with a very low illegal logging rate” of 0.4 hectares last year.
The Monarchs more than 4,000 kilometers travel each year from Canada and the US to spend the winter in the Mexican forests, home that they share with more than 130 species of birds and 56 of mammals.