We know small populations are especially vulnerable to environmental fluctuations, and we think that’s what happened this ...

The Xerces Society for Invertebrate Conservation announced Friday that it counted just 9,119 monarchs in 2024, a decrease of ...

Look closely at your backyard butterflies! Here's how to detect the subtle differences among the three butterflies that look ...

The U.S.' monarch butterfly population dropped 96% between 2023 and 2024, almost a 30-year low. Here's how you can help.

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 ...

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 ...

DESCRIPTION: The monarch is a large orange butterfly that flies with its wings held in a “v” shape. The wings have prominent dark veins and two rows of white spots at the edges, and the body is dark.

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 ...

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 ...

ALEXANDRIA — The National Garden Bureau has named 2025 the Year of Asclepias (milkweed) — and for good reason. This resilient ...

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 ...