June 10, 2019

According to the U.S. Fish & Wildlife Service, Pacific Southwest Region, Monarchs face many risks that are resulting in declining populations in both the eastern and western parts of North America range. The largest impacts come from the lost of habitat for breeding, migrating, and overwintering. In addition, pesticides that are used to control insects and weeds have harmful unintended consequences for Monarchs, a changing climate may be making some habitat less suitable and forcing changes in migratory patterns, and Monarchs face many risks from natural enemies such as predators, parasitoids, and disease.