Order: Anseriformes
Family: Anatidae
Aythya nyroca
Ferruginous Duck

Size: 38-42 cm
Habitat
They are very scarce. They prefer salty-waters with plenty of aquatic vegetation. They are often seen in lakes, in winter, as well as in rivers, estuaries, deltas, and seaside lagoons.
Distribution: Mediterranean basin, Eastern Europe, and Central Asia. In Spain they can be seen in Castilla la Mancha, Valencia (Albufera of Valencia and El Hondo) and in Andalucía in the Marismas del Guadalquivir between Huelva and Cádiz, as well as in the Guadalhorce delta in Málaga.
In Andalusia their conservation status is ‘Critically Endangered’. In the rest of Spain ‘in Danger’.
In Doñana they can be seen in the Santa Olalla lagoons, in la Rocina, in El Acebuche and in El Palacio. They seldom breed in Spain.