A Muscovy is a large, distinctive species of duck (Cairina moschata) native to Mexico, Central America, and South America. Unlike the familiar mallard-derived ducks most people picture, Muscovies belong to a separate lineage entirely. They’re the only domesticated duck not descended from mallards, which makes them biologically and behaviorally unusual. You’ll recognize them instantly by their red, bumpy facial skin and their surprising silence: Muscovies don’t quack.
What Muscovy Ducks Look Like
The most striking feature is the red, warty skin around their faces, called caruncles. These fleshy patches are more prominent on males and give the bird a look that’s often described as strange or prehistoric. Wild Muscovies are mostly black with iridescent green and purple feathers and bold white wing patches. Domestic Muscovies, on the other hand, come in a wide range of colors: solid white, black, chocolate, blue, and pied combinations.
Males are remarkably large. A Muscovy drake is the largest duck in North America, with mature males reaching roughly 10 to 15 pounds depending on the population and whether they’re wild or domestic. Females are strikingly smaller, typically about half the male’s weight. This size gap between the sexes is one of the most extreme of any duck species. Both sexes have long necks, broad flat tails, and strong claws on their feet, an adaptation tied to one of their more unusual habits: perching in trees.
Where They Come From and Where They Live Now
Muscovy ducks originated in the tropical forests of Central and South America, where wild populations still thrive along forested rivers and swamps. In the United States, a small wild population exists along the lower Rio Grande in southern Texas, specifically in Hidalgo, Starr, and Zapata Counties. These are considered the only truly wild Muscovies in the country.
Domesticated centuries ago by indigenous peoples in the Americas, Muscovies have since been introduced to every inhabited continent. Feral populations, descended from domestic birds that escaped or were released, now live in parts of Florida, Louisiana, and other warm-climate states, as well as in Canada, Europe, Africa, and Asia. In many of these places, they’ve adapted easily to urban parks, ponds, and suburban neighborhoods.
Behavior and Vocalizations
Muscovies are one of the quietest domestic poultry species. Instead of quacking, males produce a low hissing sound, often while raising the crests on their heads, shaking their tails, or lifting their wings. Females make a soft, breathy cooing. This near-silence is one reason people keep them in residential settings, and it’s a quick way to tell a Muscovy from any other duck at a distance.
They’re also strong fliers, especially the lighter females, and they perch comfortably on tree branches, fences, and rooftops. Their nesting habits reflect this: wild Muscovies build nests in tree cavities and hollows 10 to 65 feet above the ground, though they occasionally nest on the ground in dense vegetation near water. Domestic Muscovies will use nest boxes, barn ledges, or any elevated shelter they can find.
Diet and Pest Control
Muscovies are omnivores that forage on a mix of plants, insects, slugs, snails, and small aquatic creatures. On pasture, they graze on tender grass, weeds, and berries while actively hunting insects. Their appetite for flies is especially well documented. Field trials in Canadian swine and dairy facilities found that Muscovy ducks controlled more than 90 percent of the adult and larval fly population in enclosed livestock pens. The ducks followed cattle and pigs around, even snatching pests directly off the animals’ hides while they rested.
Beyond flies, Muscovies are reported to eat mosquitoes, fleas, ticks, and other insect pests. This makes them popular on small farms and homesteads as a chemical-free form of pest management, in addition to their value for eggs and meat.
Reproduction
Muscovy hens lay clutches of around 8 to 16 eggs, typically in a single nest that they line with down feathers. The incubation period is notably longer than most ducks, running about 35 days compared to the 28 days typical of mallard-derived breeds. Hens are attentive mothers and will brood and raise their ducklings with minimal human intervention, which is another reason they’re favored by small-scale poultry keepers. Males play no role in nesting or rearing young.
Legal Status in the United States
Muscovy ducks occupy an unusual legal position. The U.S. Fish and Wildlife Service issued a control order that allows landowners and wildlife agencies anywhere in the contiguous United States (except those three southern Texas counties with wild populations) to remove or destroy feral Muscovy ducks, their nests, or their eggs without a federal permit. This applies to feral and free-roaming birds, not to Muscovies kept as domestic poultry on your own property.
The regulation exists because feral Muscovies can hybridize with native species and compete for nesting sites. In the three Texas counties where wild Muscovies naturally occur, any removal requires a specific depredation permit. Notably, birds removed under the control order cannot be kept for personal consumption or sold. They must be buried, incinerated, or donated to public institutions for scientific or educational use. Anyone removing feral Muscovies must also use nontoxic ammunition and avoid harming any endangered species or other migratory birds in the process.
The Homeopathic Connection
Muscovy ducks have an unexpected link to the over-the-counter remedy Oscillococcinum, a widely sold homeopathic product marketed for flu symptoms. The product is prepared from an extract of Muscovy duck heart and liver, which is then diluted 200 times in succession with water and alcohol. The label lists its active ingredient as “Anas Barbariae Hepatis et Cordis Extractum,” which translates to extract of Barbary duck liver and heart (“Barbary duck” being another common name for the Muscovy). The rationale behind using duck organs traces to the idea that waterfowl can carry influenza viruses, though at 200 serial dilutions, the final product contains essentially none of the original material. A Cochrane systematic review examined the evidence for Oscillococcinum and the results remain a point of debate in medical literature.