Muskrat Reflection. Nice of this little guy to come in close for a portrait while spending some time on the side of the Yellowstone.  The muskrat (Ondatra zibethicus), the only species in genus Ondatra and tribe Ondatrini, is a medium-sized semiaquatic rodent native to North America and an introduced species in parts of Europe, Asia, and South America. The muskrat is found in wetlands over a wide range of climates and habitats.