PK-R18 · Rodents

How to get rid of Muskrats

Ondatra zibethicus

Also called: marsh rabbit (folk)

Muskrats are native semi-aquatic rodents that burrow in dam faces and pond banks. They are smaller than nutria, have a laterally flattened tail, and belong in wetlands — until they honeycomb a farm pond dam. Control is water-level management, rock riprap on dam faces, and legal trapping in season. They are not indoor rats. If you have a backyard koi pond collapse, look for burrows at the waterline, not a kitchen bait station.

Muskrat (Ondatra zibethicus) — identification photo
Identification photo of Muskrat (Ondatra zibethicus). Use this with the notes below — size, color, and markings matter more than a single photo, and look-alikes are listed in the sidebar.

How to identify Muskrat

  • Cat-sized, dense brown fur, scaly tail flattened side-to-side, no orange-tooth nutria look.
  • Burrows in banks; lodges of vegetation in some marshes.

Signs of an infestation

  • Holes at the waterline, cloudy water after slides, missing aquatic plants.
  • Feeding platforms of clipped vegetation.

Biology and why they show up

They eat aquatic plants and some mussels. They breed through warm months. Predators include mink. They are active in winter under ice in the North.

Health and property risk

Dam failure is the expensive risk. Native species — overcontrol can be ecologically dumb on a natural marsh. Focus on infrastructure.

Proven control sequence

Work in this order. Skipping inspection or exclusion is why most “treatments” bounce back in a week.

  1. Harden the dam. Riprap and proper pond design beat a yearly trap war.
  2. Trap in season if legal. Follow state furbearer rules. Water sets are not beginner tools.
  3. Do not poison a pond. Off-label rodenticides in water are illegal and kill more than muskrats.

Prevention that actually sticks

  • Steep, rocky dam faces.
  • Avoid lush shallow shelves against an earthen dam if you cannot tolerate burrows.

When to hire a licensed professional

Pond contractors plus licensed trappers. Homeowners should not experiment with underwater sets.

Legal and safety notes. Furbearer seasons, permits, and method restrictions. Native wildlife, not an open-season rat.

United States and Tier 1 notes

Nationwide wetlands. Less relevant in true desert without water features. Europe has introduced muskrats as invasives in some basins — local rules differ.

Common questions

Will a dummy owl stop muskrats?

No. Armor the dam.

Sources

Written by the Pest Kill Editorial Team. Published August 25, 2026. Last reviewed September 13, 2026.