Wild bison destined for Banff National Park are prepared for loading and travel at Elk Island National Park's bison-handling facility in Alberta, Canada, on Jan. 31.
Johane Janelle/Parks Canada /Reuters
A bison herd with calves travels through Lamar Valley, Yellowstone National Park. The park has proposed a cull of 1,000 bison, primarily cows and calves, this winter.
Neal Herbert/National Park Service/Flickr