Female nutrias have nipples on their flanks so they can feed their young in the water. Not only are invasive nutria catastrophic for the environment, but they also play host to several diseases and parasites including tuberculosis, tapeworm, liver flukes and nematodes. Nutria reach sexual maturity at four to six months. They have been nicknamed Swamp Beaver, Argentine Beaver and American Beaver. They have coarse yellow-brown to reddish-brown hair on their top coat, while their underfur is gray colored, dense and softer in texture. The destructive creatures also burrow into the flotation supports under boat docks and wharves, underneath building foundations, roads, streams and dams, which can weaken these structures and cause them to lean, sink and collapse. Also digs basketball-sized bank dens. Males and females may grow to 20 pounds and 18 pounds, respectively. These mammals are native to South America and were introduced into the United States between 1899 and 1930 through the fur industry, according to the U.S. Kansas City Rat Control: The Norway Rat, Roof Rat, and House Mouse inhabit most areas of North America that people inhabit, including most Missouri cities. A muskrat will be 16 to 25 inches in total length with a tail 7 to 12 inches long. Nutria adults range in size from 12 to 18 pounds with some individuals reported as large as 37 pounds. Burrowing is the most commonly reported damage caused by nutria. In the 1800s, fur traders brought nutria to the U.S. so that the animals could be easily harvested for their thick and soft undercoat of fur. Today, nutria populations are found across the U.S., primarily in the coastal states, according to FWS. Nutria Diet: Nutrias are herbivores. Smaller, kidney bean shaped scats, often deposited in small piles on logs and other structures, Large loose piles of sawdust-like scat usually deposited in water, Loose tar-like scat comprised of fish scales. Reproductive peaks occur in late winter, early summer, and mid-autumn. According to the Florida Administrative Code, Class I animals are illegal to possess, and Class II animals require a permit.Class I animals include bears, large cats, rhinos, crocodiles, chimpanzees, and more. Size. Nutria distribution as reported by trappers You can think of the Nutria as a large rat or a beaver with a small tail. But nutria aren't considered picky eaters as they're often caught eating crops such as rice, sugarcane and corn. Beaver, the largest North American rodent, can weigh up to 100 pounds but this is unusual. Stay up to date on the coronavirus outbreak by signing up to our newsletter today. Reproduction and survival may be influenced by extreme weather conditions. Rachel Ross - Live Science Contributor It just takes a single, pregnant female to quickly repopulate an area from which nutria were previously eradicated. The agency recommends building 3-foot (91-cm) wire fences buried at least 6 inches (15 cm) underground around gardens and lawns, putting electric wire fences around vegetation, or constructing sheet metal shields around wood structures to prevent nutria from gnawing on them. Nutria (Myocastor coypus) are relatively big rodents that grow to between 17 and 25 inches long (43 to 64 centimeters) from head to rump, which is about the same size as a raccoon. The species has a hunched body; a round, nearly hairless tail; a valvular mouth and nose; and pentadactyl feet with naked soles. When pursued, nutria can swim long distances under water and see well enough to evade capture. Join us today, and a generous donor will match your first monthly gift! Beaver, Muskrat and Nutria Identification. 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