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

Davi's father found the syringe his son used to inject himself under his pillow while ... a poisonous toxin and is stored in their bodies. This is what makes the monarch butterfly taste so terrible to ...

In a world where environmental challenges often feel overwhelming, one determined 8-year-old is proving that age is no ...

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