The monarch butterfly migration is one of the great wonders of the natural world. Every year millions of them travel immense ...

A Monarch butterfly (Danaus plexippus) is pictured at the Sanctuary of El Rosario, Ocampo municipality, Michoacan state, Mexico, on February 3, 2020.

Mexico's Butterfly Biosphere Reserve. Butterfly Pavilion is the first Association of Zoos and Aquariums (AZA)-accredited, standalone, nonprofit invertebrate zoo in the world and a leader in ...

Mysteries of the Maya Chichen Itza, located in the Yucatán Peninsula, is not just any archaeological site. It stands as one ...

Seven years ago, the team began transplanting pine seedlings collected from eight spots in the Monarch Butterfly Biosphere Reserve into a community nursery in Ejido la Mesa, in the State of Mexico ...

Monarch butterflies flock to Mexico’s oyamel fir forests each year, where they cling to tree branches during their winter hibernation. Tomas Vrba and Lindsey Parkinson/500px Prime/Getty Images Plus ...

After undertaking an epic journey of up to 2,800 miles from Canada and the United States, they’ve come to Mexico’s Monarch Butterfly Biosphere Reserve to rest and reproduce—and prepare for ...

But in just one year, the population of monarch butterflies wintering in those hillsides dropped 22 percent, according to a World Wildlife Fund (WWF) Mexico report released last week.

A couple of Monarch butterflies mate at the Monarch Butterfly Biosphere Reserve, near the town of Chincua, Mexico, Thursday, Feb. 26, 2009. The Monarchs are not endangered, but scientists say ...