Introduction of Muskrat Into Europe. (Ondatra zibethica). Physical Characteristics. Muskrats are about 12 inches long. They weigh roughly 2 to 4 pounds. They have long rusty brown hairs with very dense silky under fur. The belly side is lighter colored.
Example of a snowy opening to a Muskrat Lodge
RED= Native Range of Muskrat
GREEN= Introduced Range of Muskrat