New research shows climate change may push monarch butterflies farther south and make their long migration harder in the ...

Suitable habitat for migrating monarch butterflies will shift southwards because of climate change, according to a study ...

Climate warming can impact plant quality, which in turn shapes the nutrition and immune defense of insect herbivores like monarch butterflies.

Retired schoolteacher Tachi Dellinger pointed inside a mesh box, where three green chrysalises hung. “This one is starting to change color,” Dellinger said. “It will turn jet black ... when it's ready ...

Photo Caption: This is one of a dozen winter monarch butterflies that were raised from larvae found by Bob Pish shortly before Christmas. Photograph by Bob Pish. During the 12 years this column has ...

The California State Parks Foundation is asking residents to report monarch butterfly sightings in an effort to support ongoing research into the species' whereabouts. The request comes ahead of ...