Other Scientific Names
Cygnus melanocorypha [Sibley and Monroe (1990, 1993)], Cygnus melanocoryphus [BirdLife International (2004)], Cygnus melanocoryphus [Stotz et al. (1996)]
Black-necked Swan (Cygnus melancoryphus) [XC510828]
by Doug Knapp from Trilha do Talha-Mar, PARNA Lagoa do Peixe, Tavares, Rio Grande do Sul, Brazil (flight call)
Black-necked Swan (Cygnus melancoryphus) [XC48076]
by Peter Boesman from Yali, Chile (call, wings beats & call)
Subspecies
Believed to form a complex of species with Mute Swan (Cygnus olor) and Black Swan (Cygnus atratus).