State Parks counted way fewer butterflies in the middle of their migration than hoped.

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

PACIFIC GROVE — The Thanksgiving holiday has historically marked the peak sightings of western monarch butterflies on California’s Central Coast. The peak reached 8,000 this year, a fraction of what ...

The monarch butterfly (Danaus plexippus) population has plummeted by 80% to 95% since the 1990s, depending on the region and ...

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

Last season, 60 Minutes witnessed the migration of monarch butterflies. Scientists are now using tiny, solar-powered radio ...

When this monarch butterfly hits the sky it won't be traveling alone. In fact, an energetic team of researchers will be ...

Scientists used tiny new sensors to follow the insects on journeys that take thousands of miles to their winter colonies in Mexico. Scientists used tiny new sensors to follow the insects on journeys ...

The migratory monarch butterfly—the iconic subspecies common to North America—was declared endangered today by the International Union for the Conservation of Nature (IUCN), the global leading ...

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

A video filmed in Florida, USA on June 25, 2024 shows a monarch butterfly undergoing a careful wing repair using a donor wing, allowing it to recover and fly normally again. Canadian petition targets ...