Mammals crepuscular

Muskrat

Ondatra zibethicus

The muskrat is a master of the marsh, a tireless swimmer that shapes its environment through impressive lodge-building and herbivorous grooming. Often found in the quiet corners of suburban ponds, they are a fascinating glimpse into the hidden life of our local waterways.

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Quick Identification

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Size

Total length 16–28 inches (40–70 cm); Tail length 7–12 inches (18–30 cm); Weight 1.5–4.5 lbs (0.6–2 kg)

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Colors

Rich medium to dark brown fur with a lighter, silvery-grey underside; dark, scaly tail

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Key Features

Vertically flattened, scaly tail used as a rudder
Small, bead-like eyes and tiny ears nearly hidden in fur
Stocky, rounded body with dense, waterproof underfur
Webbed hind feet for efficient swimming

When You’ll See Them

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Activity pattern crepuscular

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Peak hours 4 PM - 8 PM and 4 AM - 7 AM

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Season Year-round, but most visible in Spring (March–May) during mating and territory establishment.

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Diet Primarily herbivorous, focusing on aquatic plants like cattails, water lilies, and pondweed; occasionally eats mussels, crayfish, or small fish if vegetation is scarce.

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Habitat Wetlands, marshes, ponds, slow-moving streams, and even suburban drainage ditches or golf course water hazards.

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Behavior

Muskrats are highly industrious semiaquatic rodents that spend the majority of their lives in or near the water. They are most famous for their architectural skills, often building 'push-ups' or lodges made of vegetation and mud in shallow water, or excavating complex burrow systems into the banks of ponds and streams. While they are generally solitary, they are known to share lodges with family members during the cold winter months to conserve body heat.

In the water, the muskrat is a graceful navigator, using its unique vertically flattened tail to steer while its powerful hind feet provide propulsion. On land, however, they appear somewhat lumbering and vulnerable. While they are typically shy around humans, they can be quite territorial with other muskrats, especially during the spring breeding season when 'scent posts' are used to mark boundaries with a heavy, musky secretion.

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Camera Tips

To capture high-quality muskrat footage, your camera placement is everything. Look for 'feeding platforms'—flat mats of chewed-up vegetation or mud near the water's edge. Muskrats prefer to eat in the same spot repeatedly for safety, making these platforms the ideal target. Position your camera on a low-profile stake just 6 to 12 inches off the ground, angled slightly downward toward the water-land interface. If you are monitoring a bank burrow, place the camera 5-10 feet away from the entrance hole to ensure the wide-angle lens captures the animal's full body as it emerges.

Since muskrats are most active during the 'blue hour' of dusk and dawn, as well as throughout the night, ensure your camera has a strong Infrared (IR) flash. However, be wary of 'white-out'—if the camera is too close to the water, the IR flash can reflect off the surface or the wet fur of the muskrat, overexposing the image. Using a 'No-Glow' or 'Black IR' camera is recommended to avoid startling these wary rodents, which can be sensitive to the faint red glow of standard LEDs.

Video mode is highly superior to still photos for this species. A 15-20 second video clip will allow you to see their unique swimming gait and how they use their tails to maneuver. If you are trying to attract them to a specific spot for a clear shot, a small pile of fresh apple slices or carrots placed on a log near the water can act as an irresistible lure. During the winter, look for 'breathing holes' in the ice; muskrats will often surface at these specific spots, providing a predictable frame for your camera.

Similar Species

Species that look similar or are commonly confused with Muskrat.

North American Beaver

Much larger (30-60 lbs) with a broad, horizontally flattened tail and no visible ears.

Nutria

Larger than a muskrat with a round, rat-like tail and bright orange front teeth.

North American River Otter

Longer, more muscular body with a thick, furred tail and a more playful, predatory swimming style.

Frequently Asked Questions

Muskrats are primarily crepuscular, meaning they are most active during the twilight hours of dawn and dusk. However, it is not uncommon to see them swimming during the day in quiet areas or foraging throughout the night.

The best way to attract muskrats is to maintain a natural shoreline with plenty of native aquatic vegetation like cattails and rushes. Avoid using rip-rap or concrete walls. You can also place sweet treats like apples or carrots near the water's edge to encourage them to visit a specific camera spot.

Their diet is about 95% plant-based, consisting of the roots, shoots, and leaves of aquatic plants. Cattails are their favorite food source and building material. In the winter, they may supplement this with protein from freshwater mussels or crayfish.

Yes, muskrats are incredibly adaptable. They are frequently found in suburban retention ponds, drainage ditches, and ornamental garden ponds, provided there is enough water and vegetation to sustain them.

The easiest way is the tail: a muskrat has a thin, vertically flattened tail, while a beaver has a wide, horizontally flat paddle-shaped tail. Additionally, muskrats are much smaller, weighing around 2-4 lbs, compared to an adult beaver which can exceed 40 lbs.

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