Overview
- Sectur Michoacán confirmed on November 12 the arrival of tagged monarch MW026 at El Rosario within the Monarch Butterfly Biosphere Reserve.
- Released on September 27 in Lawrence, Kansas with a 60‑milligram solar micro‑transmitter, MW026 was detected through Oklahoma and Texas into Tamaulipas, San Luis Potosí, Guanajuato, Querétaro and the State of Mexico before reaching Ocampo on November 9.
- The project, led by David La Puma of Cellular Tracking Technologies with Monarch Watch, seeks full‑route data to strengthen coordinated protection across Canada, the United States and Mexico.
- Sanctuaries open to visitors on November 21 for the 2025–2026 season, with the main clustering expected in December and January after a mass arrival recorded November 8–20.
- Researchers report climate‑driven shifts in reproduction timing, habitat and key resources, while U.S. Fish and Wildlife estimates extinction risk by 2080 of 56–74% for eastern monarchs and over 95% for western monarchs, following severe weather losses such as a 58% drop in California in 2022–2023.