Marmots and pikas share a similar ecological niche,
haunting the higher elevations in rocky settings. The
yellow-bellied marmot (Marmota flaviventrus) is also known as "the
whistle pig" because of its chubby frame and the fact that it emits a
screeching call when threatened by predators. Marmots are ground
squirrel-like and surprisingly mobile. As the name suggests, they
have fluffy, yellowish fur on their underbellies. Their backs are
covered with gray-tinted hair that also has a tint of yellow underneath.
They are common along higher altitude sections of the highway.
Where To Find Them
Yellow-bellied marmots can sometimes be seen along high elevation roads
such as the one at Dunraven Pass. Another excellent place to view
marmots is along the highway as it passes through the Beartooth Pass
outside the northeast entrance to Yellowstone National Park.