Monarch butterflies are a keystone species, meaning they play a massive role in their native ecosystems. Think you know ...

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

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

Monarch butterflies are important culturally and ecologically across North America. Generations have watched in wonder as yellow-and-black striped caterpillars fold into green-and-gold chrysalises and ...

Monarch butterflies are important culturally and ecologically across North America. Generations have watched in wonder as yellow-and-black striped caterpillars fold into green-and-gold chrysalises and ...

Explore the worrying decline of Monarch butterflies in Texas and the implications for pollination and food production. Learn why preserving these butterflies is vital for a sustainable ecosystem.

If you are a UD faculty member interested in writing about your research for The Conversation, please email ocm@udel.edu. Monarch butterflies are among the most beloved insects in North America. They ...

Monarch butterflies have declined 80 percent or more in recent decades Each year, eastern monarchs embark on a migration spanning thousands of miles and multiple generations to overwintering ...

On the other, Fred Urquhart, a University of Toronto zoologist who, for decades, had been puzzling over an entomological conundrum: Where do monarch butterflies go in winter? “We have found them ...

The Western population of the monarch butterfly has declined to a near-record low with fewer than 10,000 found living in California this winter, a foreboding sign for the future of the beloved ...