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

The Western population of the monarch butterfly has declined to a near-record low with fewer than 10,000 found living in ...

A fund set up by STRI staff scientist Annette Aiello intends to provide long-term funding for the preservation and management ...

The number of monarch butterflies spending the winter in the western United States dropped dramatically this year ...

The area for the butterfly garden at EPCOT International Flower & Garden Festival is now surrounded by green scrim.

Painted lady butterflies are world travelers. The ones we encounter in Europe fly from Africa to Sweden, ultimately returning ...

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

The number of monarch butterflies spending the winter in the western United States has dropped to its second-lowest mark in ...

The findings challenge previous assumptions about butterfly migration and highlight the role of phenotypic plasticity.

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