Threatened species

The number of monarch butterflies spending the winter in western states like Arizona and California dropped dramatically even as federal officials move to extend protections for the pollinator.

Environmental groups are calling on federal officials to prevent populations of non-native smallmouth bass from establishing below Glen Canyon Dam on the Colorado River.

Commissioners argued that they need more time to hear input from Indigenous tribes affiliated with where the tree lives.

The U.S. Fish and Wildlife Service on Wednesday announced it’ll designate nearly 450 miles of streams in Arizona and New Mexico as critical habitat for…

An environmental group has agreed to drop a lawsuit after reaching an agreement with federal and state agencies about how to handle forest thinning…

State and federal wildlife managers are investigating the death of three endangered Mexican Gray Wolves found last month in Arizona.Officials with the…