Climate change and industrial agriculture have decimated the western monarch butterfly’s crucial food source, threatening the ...

The western monarch migration occurs over multiple generations ... The largest overwintering clusters this winter were observed in Santa Cruz County, with top mid-season counts at Lighthouse ...

Dominic Bracco II Monarch Butterfly Biosphere Reserve, a 139,019-acre sanctuary carved out of the Transvolcanic Belt by the Mexican government in 2008. Dominic Bracco II The epic migration faces ...

For thousands of years, millions of monarch butterflies have migrated from the northern U.S. and Canada to Mexico for the winter. But exactly how they know where to go is still a mystery.

A Santa Cruz Metro driver keeps her eyes on the road as she steers her monarch-butterfly-adorned articulated rig up Heller Drive at UC Santa Cruz. The bus is one of 30 wrapped buses Metro operates ...