Hotel California: Migrating monarchs favor state’s parks for winter home, survey reveals

A new data analysis has confirmed the importance of California state parks for the survival of the western monarch butterfly, according to the California State Parks Foundation.

A review of 26 years of data on the western monarch butterfly population shows that a significant number are found in California state parks. Since the annual Western Monarch Count began in 1997, California state parks have hosted at least 20% of the population at overwintering sites, the foundation said.