PHOENIX - A famous jaguar known to have roamed the mountains in southern Arizona has been spotted for the first time in years south of the border. "El Jefe" was spotted in Sonora, Mexico, about 120 ...

TUCSON, Ariz.— News that the beloved jaguar El Jefe has been spotted alive and well in Sonora, Mexico, is tempered by concerns that his potential pathway back to the United States could be blocked by ...

TUCSON, Ariz.-- The only known wild jaguar in the United States is seen roaming around a creek and other parts of a mountain range in southern Arizona in the first publicly released video of the giant ...

Once called “America’s last jaguar,” the solitary male wandered across the southern border in 2011 and became the centerpiece of a campaign to protect habitat in the Santa Rita Mountains James ...

They call him "El Jefe," he is at least 12-years-old, and his crossing of the heavily guarded U.S.-Mexico border has sparked celebrations on both sides. "El Jefe" – or "The Boss" – is one of the ...

MEXICO CITY — They call him “El Jefe,” he is at least 12 years old and his crossing of the heavily guarded U.S.-Mexico border has sparked celebrations on both sides. “El Jefe” — or “The Boss” — is one ...

El Jefe, Tucson’s lone male jaguar, caught the attention of Arizonans while residing in a tree in Southeastern Arizona. For three years, pictures from trail cameras flooded conservationists’ computers ...