Monarch butterflies, found throughout Arizona, could become one of the next species listed under the Endangered Species Act.

The U.S. Fish and Wildlife Service proposal to list the monarch Butterfly as "threatened" under the Endangered Species Act on Tuesday sparked mixed responses from two North Dakota state agencies.

Wildlife officials are considering adding the monarch butterfly, which migrate to California's coast each fall, to the ...

The U.S. Fish and Wildlife Service (FWS) has proposed listing the monarch butterfly as a threatened species under the Endangered Species Act.

U.S. officials decided to extend protections to monarch butterflies after warnings from environmentalists that populations ...

The legal director at the Center for Food Safety says a proposal to list monarch butterflies as threatened under the ...

In a significant move toward conservation, the U.S. has declared that monarch butterflies will soon receive federal ...

The larger migratory populations east of the Rocky Mountains, which overwinter mostly in Mexico, are doing somewhat better.

The recent proposal by U.S. Fish and Wildlife Service to list Monarch Butterflies as threatened due to drastic population declines is a big deal.

Environmentalists say monarch populations are shrinking because of warmer temperatures from brought on by climate change, ...

U.S. wildlife officials announced a decision Tuesday to extend federal protections to monarch butterflies after years of ...

Monarch butterfly populations are plummeting due to climate change, and pesticides. Officials propose listing them as ...