This year, 500 monarch butterflies began their annual migration wearing a tiny tracker that weighs less than a grain of rice.

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

FILE - Monarch butterflies land on branches at Monarch Grove Sanctuary in Pacific Grove, Calif., on Nov. 10, 2021. The number of western monarch butterflies overwintering in California dropped 30% ...

Picture yourself in a forest surrounded by a sea of fluttering orange, black, and white wings. The air is filled with the gentle rustle of millions of monarch butterflies. This is the amazing sight ...

MEXICO CITY (Reuters) - The population of monarch butterflies in the Mexican forests where they spend the winter fell to the second-lowest figure on record this season, offering a grim snapshot of the ...

MEXICO CITY, Mexico — The number of monarch butterflies wintering in the mountains west of Mexico City rebounded this year, doubling the area they covered in 2024 despite the stresses of climate ...

MEXICO CITY (AP) — The first monarch butterflies have appeared in the mountaintop forests of central Mexico where they spend the winter, Mexico’s Environment Department said Saturday. The first ...

Hundreds of Monarch butterflies are lingering on Cat Island instead of continuing their migration to Mexico, prompting a Mississippi State University researcher to investigate the unusual behavior.

Wearing dark sunglasses, long sleeves and a wide-brimmed hat, Florida retiree Linda Cooper came prepared to gaze at ...