coscoroba

Not certain. From a local South American (perhaps specifically Chilean) name,^[1] which probably entered English via Spanish; perhaps related to Tupi casaroba, saroba.^[2][3]

coscoroba (plural coscorobas)

1. A bird of the genus Coscoroba, the only swan not belonging to Cygnus.
   • 1950, Parks & Recreation:

     Their bills and legs are pink. The two babies are very light grey with dark markings. The coscorobas built a nest in February with twigs and brush provided by their keepers. The female laid two eggs, but one rolled into the pool and the other [...]

   • 1969, Sidney Dillon Ripley, A paddling of ducks:

     The coscorobas have a wonderfully detached, rather languid manner of rising from the water and flying, well befitting their aristocratic air. Graceful, too, in their smaller proportion were the brown or Chilean pintails, [...]

   • 1972, Animal Kingdom:

     The history of the coscorobas at the Bronx Zoo is of particular interest because they were among the earliest acquisitions to the society's bird collection; four coscorobas from Brazil arrived on October 2, 1899, just a little over one month before [...]

   • 1977, National Zoological Park (U.S.), Annual Report - National Zoological Park:

     The blacks produced four cygnets, the black-necks three, and the coscorobas six. Only one black swan cygnet died. Two coscoroba cygnets, unable to compete with their siblings, were taken at 28 days and hand-reared.

• coscoroba swan

• coscoroba swan