Each year, millions of monarch butterflies travel thousands of miles across North America to escape the cold and find ...

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 ...

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

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

Animals all around the world move from place to place each year in discovery of warmer weather, greater access to food, to ...

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

The main basis for the proposal to list monarchs as threatened is that researchers are seeing fewer of the butterflies each year at their overwintering sites. There’s little debate that the monarch’s ...

This grant is more than just an opportunity it’s a lifeline for the Monarch migration,” said Shiran Hershcovich, Lepidopterist Manager at Butterfly Pavilion. The U.S. Fish and Wildlife Service ...

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