Heavy-bodied Old World diving duck having a grey-and-black body and reddish head WordNet 3.0 & Open English WordNet

The common pochard, known simply as pochard in the United Kingdom, is a medium-sized diving duck in the family Anatidae. Wikipedia

Pochard is a common name used for several species of diving ducks: Four species in the genus Aythya: Common pochard, Aythya ferina Baer's pochard, Aythya baeri Ferruginous pochard, Aythya nyroca Madagascar pochard, Aythya innotata Three species in the genus Netta: Red-crested pochard, Netta rufina Rosy-billed pochard or Rosybill, Netta peposaca Southern pochard, Netta erythrophthalma Wikipedia

Species of bird Wikidata

Any of various diving ducks of the subfamily Aythyinae, especially the common pochard, Aythya ferina. Wiktionary

Duck. Wiktionary (translation)