All the baby animals have come out to play.
Now she has four babies to fatten up for the winter. Her secret? Pine nuts.
The beavers of Yellowstone fell hundreds of cottonwood trees every year as they construct their homes.
What happens when two powerful bulls are evenly matched?
One of Yellowstone’s smallest migrating birds fights to defend his flower patch.
Red fox can hear the sounds of mice under six feet of snow during freezing Yellowstone winters.