The magnetic compass is the last unknown sense in migrating animals. For some scientists, the monarch butterfly is leading ...

Scientists in Texas are studying monarch butterflies to understand how they navigate thousands of miles, possibly by sensing ...

For the first time in California, citizen scientists can join the effort to track monarch butterflies thanks to Blu+, a new ...

In late 2024, a tagged monarch named Lionel migrated from New Jersey to Florida, logging thousands of detections along the ...

In recent years, the number of monarch butterflies has been declining, and researchers don’t know the exact cause.

The Fish and Wildlife Service will miss by well over a country mile its deadline for deciding whether to protect the monarch ...

The Trump administration has delayed a decision on whether to extend federal protections to monarch butterflies indefinitely. The U.S.

Van der Heide got her start at Cal Poly, tagging monarchs by numbering their wings in Sharpie and trying to find them later with a spotting scope, “like a needle in a haystack,” she said. This new, ...

An international collaboration to track individual monarchs kicked off this fall, including James Madison University.

For a second straight year, a low number of monarch butterflies have been counted at the popular Pismo State Beach Butterfly ...

Tree cutting at a known monarch butterfly habitat in Ventura was halted after city officials arrived at the scene and ordered ...