Aythya nyroca

Aythya nyroca (*)

Cladus: Eukaryota
Supergroup: Opisthokonta
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Superclassis: Tetrapoda
Classis: Aves
Subclassis: Carinatae
Infraclassis: Neornithes
Parvclassis: Neognathae
Ordo: Anseriformes
Familia: Anatidae
Subfamilia: Anatinae
Genus: Aythya
Species: Aythya nyroca


Aythya nyroca (Guldenstadt, 1770)

Vernacular names
Български: Белоока потапница
Česky: Polák malý
Deutsch: Moorente
Ελληνικά : Βαλτόπαπια (Ευρωπαϊκή)
English: Ferruginous duck
Esperanto: Blankokula anaso
Español: Porrón Pardo
Français: Fuligule nyroca
Magyar: Cigányréce
Italiano: Moretta tabaccata
日本語: メジロガモ
Lietuvių: Rudė
Nederlands: Witoogeend
‪Norsk (bokmål)‬: Hvitøyeand
Polski: Podgorzałka
Русский: Белоглазый нырок
Slovenčina: Chochlačka bielooká
Slovenščina: Kostanjevka
Suomi: Ruskosotka
Svenska: Vitögd dykand
Vèneto: Moreta, Magasseto rosso

The Ferruginous Duck (Aythya nyroca) is a medium-sized diving duck from Eurasia. The species is known colloquially by birders as "Fudge Duck".

Their breeding habitat is marshes and lakes with a metre or more water depth. These ducks breed in southern and eastern Europe and southern and western Asia. They are somewhat migratory, and winter farther south and into north Africa.

The adult male is a rich chestnut colour with a darker back and a yellow eye. The pure white undertail helps to distinguish this species from the somewhat similar Tufted Duck. The female is similar but duller, and with a dark eye.

These are gregarious birds, forming large flocks in winter, often mixed with other diving ducks, such as Tufted Ducks and Pochards.

These birds feed mainly by diving or dabbling. They eat aquatic plants with some molluscs, aquatic insects and small fish. They often feed at night, and will upend (dabble) for food as well as the more characteristic diving.

It is one of the species to which the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA) applies.


1. ^ BirdLife International (2006). Aythya nyroca. 2006. IUCN Red List of Threatened Species. IUCN 2006. www.iucnredlist.org. Retrieved on 12 May 2006. Database entry includes a range map and justification for why this species is near threatened

Further reading

* Showler, D.A. & Davidson, P. (1999): Observations of Jerdon's Babbler Chrysomma altirostre and Rufous-vented Prinia Prinia burnesii in Punjab and North-West Frontier Provinces, Pakistan. Forktail 15: 66-76. PDF fulltext
* Singh, A.P. (2002): New and significant records from Dehra Dun valley, lower Garhwal Himalayas, India. Forktail 18: 151-153. PDF fulltext
* Vinicombe, K. E. (2000) Identification of Ferruginous Duck and its status in Britain and Ireland British Birds 93(1):4-21
* Vinicombe, K. E. (2007) ID in depth - Ferruginous Duck Birdwatch 176:24-26

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