Monarch butterflies are unique in their migration patterns. Eastern monarchs travel between Mexico and the U.S., spending ...

From 2003 to 2019, amateur butterfly enthusiast Harlan Radcliff spent his lunch breaks observing butterflies on the grounds ...

The study was one of several that assessed the effects of climate change on three species of butterflies whose populations are declining.

The iconic monarch butterfly is declining across North America. You can help make a difference by providing the species with ...

The study was one of several that assessed the effects of climate change on three species of butterflies whose populations ...

Some of the largest clusters this season were found in Santa Cruz County, with 1,406 monarchs at Lighthouse Field State Beach ...

ASGA's vice president of science and innovation told sugarbeet growers the potential listing of monarch butterflies as ...

Just over 9,000 monarchs were counted in California last winter, the second lowest ever since the annual count began in 1997 ...

The natural phenomenon of the iconic monarch butterflies migrating south for the winter is a fascinating one - and it's one that's under threat.

The number of monarch butterflies in California is in sharp decline this year. This is the second-lowest population recording since tracking began in 1997. Biologists say record-high late summer ...

The number of monarch butterflies spending winter in the western U.S. dropped dramatically this year, despite moves to extend ...