By MARIA VERZA, Associated Press-4h ago

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MEXICO CITY (AP) — 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.

©Provided by Associated PressIn this photo provided by the University of Arizona and U.S. Fish and Wildlife Service shows a male jaguar photographed by motion-detection wildlife cameras in the Santa Rita Mountains in Arizona on April 30, 2015 as part of a Citizen Science jaguar monitoring project conducted by the University of Arizona, in coordination with U.S. Fish and Wildlife Service. According to Borderlands Linkages, a binational collaboration of eight conservation groups, this cat is known as “El Jefe,” or “The Boss,“ is one of the oldest jaguars on record along the border and one of few known to have crossed the border. (University of Arizona…