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News: Population Trends

2013-14 California Overwintering Population Numbers Released

The Xerces Society for Invertebrate Conservation released data illustrating the 2013-14 monarch overwintering population in California. While the western population is holding steady, it is still well below the peak seen in the 1990s.  Read More »

2013-14 Monarch Overwintering Population Numbers Released

WWF-Mexico hosted a press conference this morning to release the status of the 2013-2014 monarch overwintering population measured in central Mexico. The population has reached a record low, occupying only .67 hectares.  Read More »

2012-13 Overwintering Population Report

The monarch overwintering population in Mexico overwintering sanctuaries reached an all-time low of 1.19 hectares in 2012-13. You can support monarchs by planting milkweed and nectar plants, becoming a citizen scientist monitor, and by educating others.  Read More »