Celebrating 10 years of observations!
31 July to 9 August 2026
The International Monarch Monitoring Blitz is an annual North American event dedicated to research aimed at protecting the monarch butterfly. The goal? To take a snapshot of the presence of milkweed and monarch butterflies in your area. This year, the Monarch Blitz is celebrating its 10th anniversary! From 31 July to 9 August 2026, thousands of volunteers across North America joined the celebration by searching for monarch butterflies and milkweed plants in their area.
Thank you to everyone who participated in Mission Monarch and helped make the 10th anniversary of the Monarch Blitz unforgettable.
If you would like to learn more about the 2026 International Monarch Monitoring Blitz, visit the Commission for Environmental Cooperation’s Blitz website or send us an email!
Monarch Blitz stories
“When I planted milkweed many years ago, I had no idea that planting it would change how I view life.” – Allison Berringer
“2026 was an exceptional year. In addition to the Blitz, I saw and reported more than 170 monarch butterflies and hundreds of caterpillars.” – Johanne Comte, Translated from its original language, French.
“I started planting swamp milkweed about 5 years ago in my garden and have enjoyed watching the butterflies and caterpillars ever since.” – Karen Pavao
Your photos
Partners
The Monarch Blitz is organized by a collaboration of organizations across North America, including: the Commission for Environmental Cooperation (CEC), the Insectarium de Montréal | Espace pour la vie, Environment and Climate Change Canada (ECCC), the Canadian Wildlife Federation (CWF), the Monarch Joint Venture, Journey North, the U.S. Fish and Wildlife Service (USFWS), the Xerces Society for Invertebrate Conservation, Profauna, A.C. and Mexico’s National Commission of Protected Natural Areas (CONANP).
