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

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

New research shows butterfly populations have fallen dramatically over the past two decades, but there’s a lot you can do to help these fluttering flower-lovers, even if all you’ve got is a single pot ...

A new study finds the number of butterflies has dropped 22% since 2000, a new study finds. Scientists blame insecticides, ...

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

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

The number of monarch butterflies wintering in the mountains ... across North America in large part due to the reduction in milkweed where the monarchs lay their eggs. The plant has been ...