Muscovy Duck

The Muscovy Duck (Cairina moschata) is a large, heavy-bodied species of waterfowl native to the Neotropics. Distinct from typical dabbling ducks, it possesses a unique, somewhat prehistoric appearance due to the fleshy, bare skin around its face. Wild populations are wary forest dwellers, whereas feral populations have successfully colonized urban and suburban ponds across the globe. They are among the largest ducks in North America, with males being significantly larger and heavier than females.

Appearance

Identifying a Muscovy Duck depends heavily on whether you are observing a wild individual or a feral/domestic variant.

• Wild Muscovy Ducks: These birds are sleek and uniform. They feature an all-black plumage glossed with deep, iridescent green and bronze under direct sunlight. Their wing coverts host large, prominent white patches that are highly visible during flight.
• Feral Muscovy Ducks: Considerably bulkier and less agile, feral birds exhibit highly variable plumage. They can be completely white, patchy black-and-white (piebald), chocolate brown, or slate gray.

Key Field Marks

• Facial Caruncles: Both forms feature bare, bumpy red skin (caruncles) around the eyes and base of the bill. This is much more pronounced and bulbous in mature males.
• Size Dimorphism: Males are massive, often weighing twice as much as females, with a blocky head and a small crest of feathers on the crown that they can raise when excited or threatened.
• Bill: High-bridged, ranging from blackish in wild birds to pale pink or mottled in feral individuals.

Similar Species

• Mallard: Though feral Mallard-derived ducks can also be bulky and strangely colored, they lack the fleshy red facial caruncles and the crest-raising behavior of the Muscovy Duck.

Native Range

In their wild state, Muscovy Ducks are native to the tropical lowlands of the Americas, ranging from the Rio Grande Valley in southernmost Texas through Mexico, Central America, and South America to northern Argentina.

Preferred Habitats

• Wild Populations: They inhabit forested wetlands, swamps, mangrove marshes, slow-moving rivers, and flooded savannas. They rely heavily on mature, cavity-bearing trees near water for nesting and roosting.
• Feral Populations: Due to human introduction, feral populations thrive in urban parks, suburban retention ponds, golf course water hazards, and agricultural canals, particularly in Florida, Texas, and parts of Europe.

Roosting and Flight

Unlike many duck species, Muscovy Ducks are highly arboreal. They use their strong claws to grip branches, regularly roosting high in trees to avoid ground-dwelling predators. In flight, they fly with relatively slow, silent, and heavy wingbeats, showing off their broad white wing patches.

Feeding Strategy

They are opportunistic omnivores. While they spend time dabbling in shallow water for aquatic vegetation and small invertebrates, they also graze frequently on land, feeding on grasses, seeds, fallen fruits, and agricultural grains.

Vocalization

Muscovy Ducks are remarkably quiet compared to other waterfowl. They do not possess a loud, characteristic quack.

• Males: Produce a low, dry, breathy hiss when displaying or defending territory.
• Females: Emit a soft, trilling, or piping whistle to communicate with ducklings or express mild alarm.

Nesting

Wild females nest in large tree hollows up to 18 meters above the ground, while feral versions may nest on the ground under dense brush or on building ledges. Broods can be quite large, often consisting of 8 to 15 ducklings.