Captive gray wolf at the International Wolf Center in Ely, MN.
captive wolves at the International Wolf Center in Minnesota display pack behavior.
Captive gray wolves at the International Wolf Center in Ely, MN.
Captive, federally endangered gray wolf at the International Wolf Center in Ely, MN.
A federally endangered gray wolf (Canis lupus) at Zoo Montana.
The opening spread for Gray Wolves in the May 1998 issue of National Geographic Magazine.
Bob Danielson, a member of the Ojibwa tribe, wears a wolf pelt at a Minnesota pow wow.
A wolf-killed elk carcass in Yellowstone National Park.
Wild gray wolves wait to be released into the acclimation pen in Yellowstone National Park as part of the reintroduction program.
A gray wolf released into Yellowstone National Park.
A wild gray wolf waits to be released into the acclimation pen in Yellowstone National Park as part of the reintroduction program.
The footprint of a wild gray wolf in the snow in Yellowstone National Park.
A gray wolf is prepared for reintroduction into Yellowstone National Park.
Wolf biologist David Mech tracks reintroduced gray wolves in Yellowstone National Park.
Wolf biologists in Yellowstone National Park examine a dead elk for signs of wolf predation.
For fear she and her pack might harm cattle, Opal was captured and collared by USFWS workers. She was then released as a “Judas wolf” — once she lead the workers back to her pack, they were all exterminated. (Montana, outside of Yellowstone.)
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