The gestation period for muskrats is 29 days. Muskrats are thought to have one mate during rearing seasons. Populations can be estimated in the fall by counting lodges, and multiplying by 5. Habits Muskrats are somewhat sociable with others of the same species, but will often fight to the death as populations become dense. Preferred foods include a variety of vegetation, including roots, stems, and buds.
Muskrats often seek out undercut banks for protection while feeding.
Food is usually carried by this furbearer by mouth, and eating takes place above the water level. Muskrats are often active during the day, as well as night, with peak activites near dawn and dusk. Muskrats commonly stay underwater for five minutes while searching for food and they are capable of holding their breath underwater for 10-12 mintues. Territory sizes vary according to population densities and the quality of the habitat. These territories average about 200 feet in diameter in marsh habitats, and slightly longer along streams.