Definition of "nyroca" [nyroca]

• A genus of sea-ducks of the family Anatidæ and the subfamily Fuligulinæ. N. ferruginea or N. leucophthalma, formerly Fuligula nyroca, is the common white-eyed pochard of Europe. (noun)

The Century Dictionary (Public Domain)

• "The reserve is the only nesting place in Bulgaria for black cormorants Phalacrocorax carbo (90-540 pairs) and ferruginous duck Aythya nyroca (V: 60 pairs), and is the largest wintering ground for red-breasted goose Branta ruficollis (V: 20-50 pairs)."
• "Other wintering wetland birds include the threatened marbled teal Marmoronetta angustirostris, ferruginous duck Aythya nyroca, and corncrake, Crex crex; also high numbers of green-winged teal Anas crecca, northern pintail Anas acuta, northern shoveler Anas clypeata and black-winged stilt Himantopus himantopus."
• "It contains the only nesting site in Italy of pygmy cormorant (Phalacrocorax pygmaeus), and is also home to the globally threatened ferruginous duck (Aythya nyroca)."