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International Monarch Monitoring Blitz
July 27, 2019 - August 4, 2019
The International Monarch Monitoring Blitz aims to provide a valuable snapshot for scientists of monarch population status across the monarch migration paths in Canada, Mexico, and the United States.
The Blitz is an initiative from the Trinational Monarch Conservation Partnership, created through the Commission for Environmental Cooperation.
Each country has something to learn from monitoring monarchs during the same time period, and comparing these observations year-to-year. Observations reported in Canada and the northern United States provide scientists with a snapshot of the peak breeding monarch population and the presence of milkweed. Reports from the southern United States document whether early migration and breeding are occurring. Data collected in Mexico document any monarch breeding taking place in traditionally migratory areas.
More info here