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 ...

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

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

MADISON, Wis. (AP) — The number of monarch butterflies spending the winter in the western United States has dropped to its ...

Not that long ago, monarch butterflies would migrate in droves. However, over the last few decades, the number of these ...

Fewer-than-usual monarch butterflies ... when only 199 butterflies were counted at the overwintering site. Pismo Beach’s butterfly count matches migration data from the rest of the West Coast.

MADISON, Wis. — The number of monarch butterflies spending the winter in the western United States has dropped to its second-lowest mark in nearly three decades as pesticides, diminishing ...

Before National Geographic published its famous August 1976 cover story detailing the search for the monarch butterfly’s wintering ... A 2,000-mile migration was thought to be a “foolish ...

For the past three years, more than 200,000 western monarch butterflies spent their winters ... insects and some mammals. Their migration also attracts visitors to California state beaches ...