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

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

Once, millions of monarchs wintered in California. But climate change, habitat loss, widespread pesticide use and disease ...

Growing milkweed from seed is one of the easiest ways to help declining monarch butterflies. In December 2024, the U.S. Fish ...

This winter, volunteers from the Xerces Society, a nonprofit environmental group, tallied just 9,119 western monarchs — a ...

This year the organization counted 9,119 monarchs, the second-lowest total since tracking began in 1997. The organization has ...

The results of the 28 annual mid-season Western Monarch Count have been released: only 9,119 of the butterflies were counted ...

The number of monarch butterflies in California is in sharp decline this year. This is the second-lowest population recording ...

Thogmartin and other researchers have evaluated more than 200 scenarios for restoring greater than 1.3 billion stems of ...

The Western population of the monarch butterfly hit a near-record low with fewer than 10,000 found living in California this ...

Biodiversity is declining across the planet, but what about in Wisconsin, how do we measure it, and how can we stop it?

A winter count of visiting monarch butterflies found a steep drop from previous years, which has scientists worried about the ...