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Mexico Opens Monarch Sanctuaries, Presses U.S. and Canada to Curb Farm Chemicals

A new national agenda standardizes monitoring and restoration protocols to strengthen trinational coordination on the migratory corridor.

Overview

  • Michoacán inaugurated the 2025–2026 season at Sierra Chincua, Senguio and El Rosario, with authorities projecting about 800,000 visitors.
  • Mexico publicly urged the United States and Canada to reduce herbicide and pesticide use that kills milkweed, calling the chemicals a key threat along the migratory route.
  • The Primera Cumbre Nacional Mariposa Monarca in Toluca produced a consensus to adopt shared protocols for monitoring, restoration, surveillance and territorial management, with plans to deepen coordination before a trilateral meeting.
  • An underground electricity line to the Sierra Chincua parador was completed outside the core hibernation zone under an approved environmental impact assessment, with a reported state investment of 3.7 million pesos.
  • WWF México reported only 2.5 hectares affected by illegal logging in the reserve’s core between April 2023 and February 2024, far below levels recorded in the early 2000s.