Steamer-duck

The steamer ducks are a genus (Tachyeres) of ducks in the family Anatidae. All of the four species occur in South America, and all except the Flying Steamer Duck are flightless; even this one species capable of flight rarely takes to the air.

They are usually placed in the shelduck subfamily Tadorninae. However, mtDNA sequence analyses of the cytochrome b and NADH dehydrogenase subunit 2 genes indicate that Tachyeres rather belongs into a distinct clade of aberrant South American dabbling ducks, which also includes the Brazilian, the Crested, and the Bronze-winged Ducks.

There are four species:
 * Flying Steamer Duck Tachyeres patachonicus
 * Fuegian Steamer Duck Tachyeres pteneres
 * Chubut Steamer Duck Tachyeres leucocephalus
 * Falkland Steamer Duck Tachyeres brachypterus

The Chubut Steamer Duck was only described in 1981.