Bob Erlich, an Evergreen Park resident, has devoted his retirement years to promoting and caring for butterflies — and ...

The team of volunteers is trying to save monarch butterflies by cultivating milkweed — the only plant where they lay eggs.

Urban monarchs formed isolated populations with limited impact on migratory butterflies, suggesting city habitats can support ...

Monarch butterflies are famous for their annual migrations, but not all migrate. In recent years, more and more monarchs have ...

By late May each year, monarch butterflies (Danaus plexippus) return to the Berkshires from their winter home in the oyamel fir forests in the Sierra Madre Mountains of central Mexico, ...

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 ...

Every fall, an incredible migration occurs through the state of Indiana, where millions of tiny monarch butterflies ... and the first spring caterpillars emerge. Ten to fourteen days later ...

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 ...

It’s the only plant that monarchs lay their eggs on, and it’s the only food that monarch caterpillars eat. Once a monarch reaches adulthood, they may still use milkweed for nectar, but a ...