News: Population Trends

2015 Population Update and Estimating the Number of Overwintering Monarchs in Mexico

The 2015 overwintering population was estimated, occupying 1.13 hectares across 9 sites in Mexico. Read more about how these numbers are estimated.   Read More »

Western Overwintering Population, 2014-15

2014-15 western overwintering numbers released and recollection of visit to overwintering sites by Candy Sarikonda.   Read More »

Dwindling Numbers for an Iconic Insect: What can we do?

In this opinion piece, learn Karen Oberhauser's view on habitat loss and the monarch population decline and how she feels we can all help reverse the downward trend.   Read More »

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 »