The population of monarch butterflies that arrived in Mexico's forests to hibernate this winter fell by 26 percent from the year before, the country's Commission for National Protected Areas and the World Wildlife Fund (WWF) said on Thursday.
The population of monarch butterflies that arrived in Mexico's forests to hibernate this winter fell by 26 percent from the year before, the country's Commission for National Protected Areas and the World Wildlife Fund (WWF) said on Thursday.
Fluttering swarms of monarch butterflies returned to the warm weather of Mexico in their annual journey, but this year the..