After causing mayhem on the East Coast, the spongy creature has infiltrated parts of Northern and Southern California.
The Western population of the monarch butterfly has declined to a near-record low with fewer than 10,000 found living in ...
The U.S. Fish and Wildlife Service is taking steps to list monarch butterflies as threatened species and designate seven ...
On Thursday, invertebrate conservation group the Xerxes Society released the results of their 28th annual Western Monarch ...