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A Tucson shovel-nosed snake slithers between brush on the desert floor. The species has twice been denied protection under the Endangered Species Act.

Claiming the federal government has failed to protect the Tucson shovel-nosed snake, the Center for Biological Diversity has sued the U.S. Fish and Wildlife Service, asking a court to declare the snake an endangered species. Read more»

A cactus ferruginous pygmy owl

More than 15 years after developers successfully sued to lift federal protections for the cactus ferruginous pygmy owl, which lives in the Tucson area, the U.S. Fish and Wildlife Service has moved to again preserve the diminutive desert owl. Read more»

A bald eagle is shown in flight in this undated Arizona Game and Fish Department photo. A state lawmaker is pushing for a broad range of protections for the eagle, which remains listed as a threatened species in Arizona.

The Trump administration on Monday finalized changes to eviscerate enforcement of the landmark Endangered Species Act, which is credited with helping to save animals like the American bald eagle and California condor. Read more»

The Sonoyta mud turtle is an aquatic species that lives in the Sonoran Desert, a difficult enough existence that experts say is being made harder by climate change. The federal government granted the turtle endangered species status Wednesday.

The U.S. Fish and Wildlife Service announced the designation Wednesday, citing threats from climate change to loss of habitat for the southern Arizona animal, whose numbers are believed to have dwindled to as low as 100 turtles. Read more»

The roundtail chub, whose dwindling range includes rivers in Arizona, would receive threatened status under the Endangered Species Act under a proposal by the U.S. Fish and Wildlife Service.

Fish and Wildlife Service proposed Tuesday listing two small species of Southwest fish as threatened under the Endangered Species Act. The proposal follows pressure from the Center for Biological Diversity, whose legal agreement with the federal agency hastened the designation of hundreds of imperiled species. Read more»

The ferruginous cactus pygmy owl is found in Pima and Maricopa counties, parts of Texas and through much of Mexico.

Two environmental groups — Defenders of Wildlife and the Tucson-based Center for Biological Diversity — filed a lawsuit Tuesday aimed at forcing the federal government to protect Arizona’s diminishing cactus ferruginous pygmy owl population under the Endangered Species Act. Read more»

The ferruginous cactus pygmy-owl is found in Pima and Maricopa counties, parts of Texas and through much of Mexico.

The Center for Biological Diversity and the Defenders of Wildlife this week filed a formal notice of intent to sue the U.S. Fish and Wildlife Service for not protecting the owl under the Endangered Species Act. The groups also object to the wording in the agency’s policy restricting the owl from receiving protection. Read more» 1

A grizzly bear in Yellowstone National Park. A conservation group has petitioned the Fish and Wildlife Service to consider reintroducing grizzlies in Arizona and other parts of the Southwest.

The Center for Biological Diversity this week petitioned the U.S. Fish and Wildlife Service to work to return grizzly bears to the Grand Canyon, the Gila/Mogollon complex and other areas of the Southwest. Read more»

A southwestern willow flycatcher perches in the West Valley.

Federal officials have added nearly 500 miles of riparian area totaling nearly 90,000 acres to habitat considered critical to the recovery of the southwestern willow flycatcher, an endangered songbird. Read more»