FLAGSTAFF, ARIZ.: Wildlife officials are trying to determine whether an animal spotted roaming the far reaches of northern Arizona is a gray wolf.

Grand Canyon Superintendent Dave Uberuaga says the park has received a couple of reports about an animal resembling a wolf.

The U.S. Fish and Wildlife Service said Thursday that the animal’s feces will be collected and tested.

The two populations of wolves nearest to the Grand Canyon are in the Northern Rockies, and in portions of eastern Arizona and western New Mexico.

Wolves largely were exterminated early last century across the lower 48 states, except in the western Great Lakes. They’ve been absent from the Grand Canyon since the 1940s.

Wolves in the Northern Rockies have fuller bodies and less pointed ears than Mexican gray wolves in the Southwest.