Painted lady butterflies are world travelers. The ones we encounter in Europe fly from Africa to Sweden, ultimately returning to areas north and south of the Sahara. But what determines whether some ...

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

The monarch butterfly population spending the winter in the western United States has declined to its second-lowest level in nearly three decades.

Overwintering populations of monarch butterflies in California have reached a near all-time low since records began, conservationists announced on Thursday. The ...

Explore the worrying decline of Monarch butterflies in Texas and the implications for pollination and food production. Learn why preserving these butterflies is vital for a sustainable ecosystem.

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 spending winter in the western U.S. dropped dramatically this year, despite moves to extend ...

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