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

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 ...

Mexican officials and environmental groups say better weather conditions on the butterflies’ migration route caused the ...

A sweeping new study reveals that butterfly populations across the continental United States have plummeted by 22% over the ...

Butterfly populations have dropped by 22% across 554 recorded species in the United States, according to a new study in the ...

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

WASHINGTON— The annual count of migratory monarchs who spend the winter in Mexico was released today and shows that the ...

Butterfly populations in the US are declining due to insecticides and climate change with alarming statistics revealing a ...

Monarchs from east of the Rocky Mountains in the United States and Canada overwinter in the mountains west of Mexico City.

A network of advocates is doing everything they can to mitigate the dangers and unravel mysteries about monarch movements and ...