Masked Duck
| Masked Duck | |
|---|---|
 | |
| Adult male in breeding plumage | |
| Conservation status | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Subclass: | Neornithes |
| Infraclass: | Neognathae |
| (unranked): | Galloanserae |
| Order: | Anseriformes |
| Family: | Anatidae |
| Subfamily: | Oxyurinae |
| Genus: | Nomonyx Ridgway, 1880 |
| Species: | N. dominicus |
| Binomial name | |
| Nomonyx dominicus (Linnaeus, 1766) | |
 | |
| Synonyms | |
|
Oxyura dominica | |
The Masked Duck (Nomonyx dominicus) is a tiny stiff-tailed duck ranging through the tropical Americas. They are found from Mexico to South America and also in the Caribbean. Primarily non-migratory, Masked Ducks are reported as very uncommon vagrants in the southernmost United States, along the Mexican border and in Florida.
The only member of the genus Nomonyx, it is intermediate between the rather primitive Black-headed Duck (Heteronetta) and the very apomorphic true stifftails. It is sometimes included with the latter in the genus Oxyura, but apparently the Masked Ducks of our time are the descendants of a missing link in the Oxyurinae evolution, having changed but little for millions of years.[2][3]
Breeding adult males have a rust-colored body with a black face and mottled wings. Adult females, winter males and juveniles have a barred brownish gray body, with two horizontal darkly colored stripes running through the buffy colored face.
These ducks mainly feed on seeds, roots and leaves of aquatic plants. They also eat aquatic insects and crustaceans. They feed by diving. Masked Ducks breed in any freshwater water body with marsh vegetation and surrounded by heavy tree cover. They also occur in mangrove swamps. These ducks are usually very secretive, but they are not rare and not considered threatened by the IUCN.[1]
References
- ↑ 1.0 1.1 BirdLife International (2012). "Nomonyx dominicus". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
- ↑ Livezey, Bradley C. (1986). "A phylogenetic analysis of recent anseriform genera using morphological characters". Auk 103 (4): 737–754.
- ↑ McCracken, Kevin G.; Harshman, John; McClellan, David A. & Afton, Alan D. (1999). "Data set incongruence and correlated character evolution: An example of functional convergence in the hind-limbs of stifftail diving ducks". Systematic Biology 48 (4): 683–714. doi:10.1080/106351599259979. PMID 12066296.
Further reading
- del Hoyo, Josep; Elliott, Andrew & Sargatal, Jordi (eds.) (1992): Handbook of Birds of the World (Volume 1: Ostrich to Ducks). Lynx Edicions, Barcelona. ISBN 84-87334-10-5
- National Geographic Society (2002): Field Guide to the Birds of North America. National Geographic, Washington DC. ISBN 0-7922-6877-6
- Sibley, David Allen (2000): The Sibley Guide to Birds. Alfred A. Knopf, New York. ISBN 0-679-45122-6