Monarch butterflies are famous for their annual migrations, but not all migrate. In recent years, more and more monarchs have been living and breeding year-round in California's Bay Area, thanks in ...

Monarch butterflies may soon get federal protections after nearly a decade-long effort to preserve the species. The monarch's eastern migratory population has fallen about 80% in the past couple of ...

The monarch butterfly is a beautiful and colorful creature, but it takes a while to reach that part of its adult life. Understanding a few facts about the process lets you observe it in nature with ...

This is an updated version of a story first published on April 20, 2025. The original video can be viewed here. Earlier this year we reported on one of the most remarkable and mysterious migrations in ...

The monarch butterfly is Illinois' state insect and has held that distinction for 50 years — having been suggested for the honor by third grade classes in Decatur in 1975. But the butterfly is also in ...

Professor Elizabeth Crone, Department of Evolution and Ecology, checks a non-native milkweed in the San Francisco Bay Area for monarch butterfly eggs and caterpillars. Known for long-distance ...