The iconic monarch butterfly is declining across North America. You can help make a difference by providing the species with ...

The number of monarch butterflies spending winter in the western U.S. dropped dramatically this year, despite moves to extend ...

The natural phenomenon of the iconic monarch butterflies migrating south for the winter is a fascinating one - and it's one ...

Are monarch butterflies endangered? Monarch population numbers are falling and it's clear that these butterflies need our ...

The number of monarch butterflies spending the winter in the western United States dropped dramatically this year even as ...

The U.S. Fish and Wildlife Service is taking steps to list monarch butterflies as threatened species and designate seven ...

The number of monarch butterflies in California is in sharp decline this year. This is the second-lowest population recording ...

The results of the 28 annual mid-season Western Monarch Count have been released: only 9,119 of the butterflies were counted ...

This winter, volunteers from the Xerces Society, a nonprofit environmental group, tallied just 9,119 western monarchs — a ...

Once, millions of monarchs wintered in California. But climate change, habitat loss, widespread pesticide use and disease ...

Scientists are grappling with a stark population decline of the western monarch butterfly after the species’ numbers hit a ...

On Thursday, invertebrate conservation group the Xerxes Society released the results of their 28th annual Western Monarch ...