Puma (Puma concolor) ecology in northern Mexico is essentially unknown and thus far, has relied on camera trapping and scat analysis to gather information. Now, Mexican gray wolves (Canis lupus baileyi), also known as "lobos," are being re-introduced into northern Mexico, and an amazing opportunity to study these predators together using cutting-edge GPS technology has emerged, with the overall goal of fostering large carnivore tolerance and coexistence in a rugged cattle ranching landscape.