Monarch Joint Venture Blog
Monarchs arrive at overwintering sites while late-season sightings continue in the north
Monarchs have reached their overwintering sites right on schedule, even as a few late-season butterflies continue to appear across the northern U.S. Dr. Karen Oberhauser shares the latest migration observations, new tracking technology, and ways to support monarch conservation. Read More
Revolutionary tracking study follows monarch butterflies to Mexico using groundbreaking technology and continent-wide collaboration
Over 400 ultra-light transmitters deployed by over 20 partner organizations deliver unprecedented, individual-level view of monarch migration using dedicated receivers and crowd-sourced location networks Read More
Monarchs still on the move as calendar turns to November
As we turn the calendar, monarch roosts are being reported in Texas and Mexico, with the leading edge of migration near Saltillo in the State of Coahuila. The first monarchs should be arriving to areas near overwintering sites soon. Read More
Strong end to monarch breeding season; leading edge of migration reaches Oklahoma
Journey North volunteers have reported monarch roosts as far as Kansas and Oklahoma, and Dr. Karen Oberhauser writes that monarch observers with the Monarch Larva Monitoring Project reported monarchs in good numbers throughout August and into September. 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