The population wintering in central Mexico's forests occupied 4.42 acres, up from 2.22 acres during the previous winter.

A study, published Thursday in the journal Science, found that 22% of butterflies in the United States disappeared between ...

US butterfly populations are declining because of insecticides, climate change and habitat loss, with the number of the ...

A new study has found that overall butterfly populations are declining across the United States. The study, which was ...

Butterfly populations have dropped by 22% in the United States, according to a new study published Thursday in the journal ...

Millions of black and orange wings will flutter across the U.S. this spring, as the monarch butterflies make their annual ...

CINCINNATI (WKRC) - A new study found that butterflies are disappearing from the United States at an alarming rate, with most ...

A Pennsylvania butterfly farmer says listing the monarch as a threatened species could do more harm than good.

Butterflies are vanishing nationwide due to habitat loss, climate change and use of insecticides, according to a new study, ...

A study recently published in the journal Science determined that the butterfly population across the continental U.S. has ...