Nomonyx dominicus
The Masked Duck, Nomonyx dominicus, is a diminutive and exceptionally secretive member of the stiff-tailed duck subfamily (Oxyurinae), renowned for its elusive nature and expert diving prowess. Measuring approximately 29-36 cm (11.5-14 inches) in length with a wingspan of 43-46 cm (17-18 inches) and weighing 290-410 grams (10-14 oz), it is one of the smallest waterfowl in its extensive range. Adult breeding males are unmistakable, sporting a striking black facial mask, a brilliant cobalt-blue...
Found primarily in dense freshwater wetlands, marshes, ponds, and slow-moving rivers with extensive emergent and floating vegetation, often in lowland areas.
Feeds primarily on aquatic invertebrates such as insect larvae, small crustaceans, and mollusks, supplemented by seeds and vegetative parts of aquatic plants. Forages by diving to the bottom of shallow waters.
Masked Ducks are notoriously secretive and cryptic, spending most of their time hidden within dense cover. They are often crepuscular or nocturnal, foraging more actively at dawn and dusk. Their foraging strategy involves deep dives to the bottom of shallow waters, using their short, strong legs ...
The Masked Duck has a broad but highly patchy distribution across the Neotropics and parts of the Nearctic. Its primary breeding range extends from southern Texas (Rio Grande Valley), through Mexico, Central America, the Caribbean islands (including Cuba, Hispaniola, Puerto Rico, and Trinidad), a...
Least Concern
- The Masked Duck is one of the smallest stiff-tailed ducks in the world, often mistaken for ducklings of other species due to its size. - Its black facial mask and bright blue bill on the breeding male are unique among American ducks. - It can remain submerged underwater for surprisingly long pe...