Monarch Butterflies Now Breeding in Quintana Roo

Cancún, Quintana Roo — The monarch butterfly is no longer just a winter visitor in the Mexican Caribbean. The conservation group Alas Mayas confirmed that the species is reproducing in multiple parts of Quintana Roo and is now mapping the areas where monarchs settle and complete their life cycle.

Cecilia Álvarez, the organization’s environmental education coordinator, said that over the past year monarchs have been documented in Isla Mujeres, Holbox, Cozumel, and the Nichupté lagoon. But more importantly, she said, researchers have found sites where the butterflies lay eggs and where caterpillars, chrysalises, and adults develop — evidence that the population is breeding locally.

“It’s surprising to see monarchs arriving from the Caribbean Sea, since traditionally this species is associated with the forests of central Mexico,” Álvarez said. “Witnessing their entire reproductive process in Quintana Roo is a discovery of great value for conservation.”

The effort builds on research from 2023 that showed the monarch’s migration route includes the Yucatán Peninsula and northern Quintana Roo. That prompted a citizen science project in which people can report sightings through Alas Mayas’s social media accounts and the iNaturalist platform. About 200 people have submitted observations so far; Quintana Roo has generated the most reports, followed by Yucatán and Campeche. One notable case was a group of roughly 300 monarchs documented on the island of Holbox.

Álvarez said a dedicated monarch sanctuary or protected areas could be created in the future, but first the organization needs to finish identifying the sites where the butterflies concentrate and reproduce. That information will be key to protecting the species, which faces conservation threats, and to preserving its role as a pollinator of native plants.

Some conservation measures are already underway. In Cozumel, the municipal Ecology Department has created pollinator gardens, launched public information campaigns, installed signage, and held awareness activities to promote the care of monarch butterflies.