The mission to return jaguars to the US: ‘We aren’t right without them’

The big cats once roamed North America but have been pushed near to extinction. Could they make a comeback?

Somewhere among the rocky pinnacles of southern Arizona's Chiricahua mountains roams the last known jaguar in the US.

The dark-spotted big cat, a male known as Sombra" to wildlife researchers, wanders between three mountain ranges, hunting for deer and piglike javelinas and, perhaps, searching for a mate.