Monarch Joint Venture Blog
Eastern monarch overwintering population increases from last year
Numbers are in from Mexico, and it's good news. Monarchs occupied 2.93 hectares during the 2025-26 overwintering season, according to the survey from Telmex Telcel Foundation Alliance (WWF) and Mexico’s National Commission of Protected Natural Areas (CONANP). Read More
Walking with the Monarchs: A Journey into Central Mexico
Guest author, Melanie Michaelchuk, shares her experience visiting overwintering monarchs in Mexico. Read More
Eastern Monarch Numbers Increase, But Conservation Efforts Still Critical
The eastern monarch butterfly population in Mexico’s oyamel fir forests this past winter occupied 1.79 hectares, according to the latest survey released by the World Wildlife Fund-Telmex Telcel Foundation Alliance (WWF) and the National Commission of Protected Natural Areas in Mexico (CONANP). This represents a 99% increase from last year’s 0.9 hectares in the 2023-2024 overwintering season. Read More