Lawsuit asks court to proclaim Fish and Wildlife erred in delisting the animal.
Arizona Game and Fish officials confirmed the kill Sunday.
The yearling is the first confirmed kill of sheep relocated last month to the Catalina Mountains north of Tucson.
State Game and Fish should be aggressively releasing information.
Female is likely looking for a mate, according to former federal expert.
They're now allowed to roam only in Eastern Arizona, southwest New Mexico.
It's the first gray wolf in northern Arizona in more than 70 years.
Not enough is being done to save Mexican gray wolves, lawsuit contends.
PHOENIX — Known for its small size and auburn color, the cactus ferruginous pygmy owl has environmentalists battling with federal officials over whether it should be protected.
Environmentalists cite a population drop of more than 90 percent.
Possible ramifications loom for Rosemont Mine, Fort Huachuca.
"Encouraging developments" could mean another transplant of the wild sheep.
The northern Mexican gartersnake has joined the ranks of federally protected species.
Petition cites 110,000 square miles of potential bear habitat in four Western states.
PHOENIX —Two environmental groups on Friday dropped their lawsuit seeking to force the federal government to determine the impact of Fort Huachuca on the San Pedro River.
A national environmental group that has spent a quarter-century trying to save imperiled owls will soon call home a historic Tucson building that was named for owls.
Three organizations supported primarily by hunters are the main private financial backers of a controversial state project to reintroduce bighorn sheep to the Catalina Mountains north of Tucson, records show.
PHOENIX — Contending prior court orders have been ignored, environmental groups want a federal judge to force Fort Huachuca to finally determine how it’s impacting the San Pedro River.
State wildlife officials declined Friday to provide current information on a controversial bighorn sheep reintroduction in the Catalina Mountains north of Tucson.
A fifth bighorn sheep has died in the Catalina Mountains — the victim of a mountain lion.