Join this year’s International Monarch Monitoring Blitz from 28 July to 6 August 2023!

The International Monarch Monitoring Blitz invites community scientists from across North America to come together with the shared goal of helping to protect and conserve the beloved and emblematic monarch butterfly. Data collected by volunteers each year support trinational efforts to better understand the monarch butterfly’s breeding productivity, range, and timing in North America.

To take part in the Blitz, please share your observations of monarchs (all life stages) and milkweed plants to the Western Monarch Milkweed Mapper (WMMM) via iNaturalist or our website https://www.monarchmilkweedmapper.org/.

Additional information about the Monarch Blitz can be found here: http://www.cec.org/international-monarch-monitoring-blitz/