Dozens of bison relocated to Oklahoma, other states

Once, there were millions of them. But by 1900, only a few hundred remained alive.

Now, dozens of bison have been relocated from the Grand Canyon's North Rim to Native American tribes in the Great Plains. A recent roundup led to the transfer of 57 of the animals.

Tribes in Kansas, South Dakota, Nebraska and Oklahoma had requested some of the massive animals.

The herd in the far northern reaches of Arizona is estimated at between 400 and 600 bison. They want it closer to 200.