University of Minnesota

MLMP contributes to the 2018 International Monarch Monitoring Blitz!

Posted on Thursday, August 2, 2018 at 12:40 pm in Uncategorized

From July 28 to August 5, 2018, volunteers from Canada, Mexico and the United States are invited to participate in the second International Monarch Monitoring Blitz (the Blitz) to help identify the monarch butterfly's breeding sites. The Monarch Larva Monitoring Project (MLMP) is proud to be collecting data for the Blitz in the United States.

Submit your observations!

What is the International Monarch Monitoring Blitz?

Launched last year, the International Monarch Monitoring Blitz provides a valuable snapshot of the status of monarchs across the monarch flyway. The Blitz is an initiative from the Trinational Monarch Conservation Partnership, created through the Commission for Environmental Cooperation.

This year, scientists from the Insectarium–Montréal Space for Life, Environment and Climate Change Canada (ECCC), the Monarch Joint Venture, the US Fish and Wildlife Service, and Mexico's Comisión Nacional de Áreas Naturales Protegidas (CONANP) are asking the public to help them understand monarch distribution and occurrence throughout North America.

Both the eastern and western populations of North American migratory monarchs have suffered steep declines over the past 20 years, and observations from volunteers can provide valuable information that will support continental efforts to protect the monarch butterfly and its habitat.

Observations reported in Canada will provide scientists with a snapshot of peak monarch breeding activity and milkweed presence in the northern extent of the monarch range. Data reported from Mexico will document monarch breeding taking place in traditionally migratory areas. In the United States, we’ll learn more about late summer milkweed and monarch abundance in both the eastern and western monarch ranges; this is a crucial period because most monarchs that are eggs and larvae then will migrate to wintering sites after they emerge as adults.

How can you contribute?

If you are in the United States, submit observations to the Blitz through the Milkweed and Monarch Observations portal on the MLMP website. Visit and look for the bright yellow button ‘Contribute to the 2018 Monarch Monitoring Blitz!’.

If you are in Canada and interested in taking part in the Blitz,  report through the Mission Monarch website and from Mexico, learn more and report through the iNaturalista website.

Regular observations at your MLMP site will also contribute to the Blitz. You do not need to enter weekly site monitoring data in both places. However, we encourage you to find some additional milkweed outside your site to monitor this week using the Blitz data entry form!

Share the Blitz on social media using #MissionMonarch and #Blitz2018!


Questions? Contact Cora Lund Preston at

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