Chauna chavaria, a species of the small family of birds Anhimidae, found in the northern regions of Colombia and Venezuela.

A freshwater bird, Podiceps nigricollis, of the grebe family (Podicipedidae)

The only South American species of swan, Cygnus melancoryphus.

plural of black-necked swan

plural of black-necked screamer

plural of black-necked grebe

Grus nigricollis, a bird of the crane (Gruidae) family, native to Asia

plural of black-necked crane