Monarch butterfly populations are declining, with western numbers at a record low, prompting conservation actions.

The 56,259 ha biosphere lies within rugged forested mountains about 100 km northwest of Mexico City. Every autumn, millions, perhaps a billion, butterflies from wide areas of North America return to ...

The U.S. Fish and Wildlife Service has announced the reopening of the public comment period for a proposed rule to list the ...

Coasting on air currents, a monarch can travel more than 100 miles in a single day, with the right conditions. One migratory ...

In 2022, the WWF reported the eastern migratory monarch butterfly population has decreased by more than 80% over the last three decades. UGA research scientist Andy Davis said in an October ...

The monarch butterfly population has declined in recent decades, leading to a proposed listing as threatened under the Endangered Species Act. People can help monarch butterflies by planting ...

Meanwhile, only 3% of species showed population increases. One of the most striking examples is the monarch butterfly. In December 2024, the U.S. Fish and Wildlife Service proposed listing the ...

MEXICO CITY, Mexico — The number of monarch ... butterfly count doesn’t calculate the individual number of butterflies, but rather the number of acres they cover as they gather on tree ...