From AZFamily.com:
Federal agents admit they mistakenly killed an endangered wolf in eastern Arizona, which might have been pregnant after an order was given to kill a different wolf. While conservationists say it’s a tragedy, ranchers in the area say the wolves have become a problem. The once-abundant Mexican gray wolves were considered extinct in the wild until about 25 years ago. Today, thanks to conservation efforts, there are over 280 Mexican wolves in the U.S. spread across Arizona and New Mexico.
But wolves have been killing cattle in eastern Arizona and New Mexico. Incidents in Greenlee County sparked a recent kill order that happened on federal public land, which ranchers also lease to graze their cattle.