Overview
- Federal, state, and community leaders opened Sierra Chincua in Michoacán, launching the viewing season and reaffirming cross‑border conservation pledges.
- Public sanctuaries at Sierra Chincua, El Rosario, Senguio, Piedra Herrada, and San Mateo Almomoloa are open daily through late March, with reports differing on the final date.
- Millions of butterflies have clustered in oyamel‑pine forests after a roughly 4,000‑kilometer journey from Canada and the United States.
- Authorities project more than 800,000 visitors and over 1,000 million pesos in economic impact between November 2025 and March 2026.
- Officials cite enforcement gains such as zero illegal logging reported in core zones, while scientists probe navigation through magnetoreception and genetic cues using miniature tracking chips, and experts warn of ongoing risks from forest loss, climate change, milkweed decline, and insecticides.