All travellers who have had an opportunity of studying these Ducks in a wild state tell us that they are beautiful, lively, and well-flavoured birds, equally attractive to the naturalist and the sportsman. This species is extensively distributed throughout the South American continent, from Paraguay to Guiana, and is to be met with almost in equal numbers near the mouths of rivers flowing into the sea, and amid the swamps and marshes of wild uncultivated parts of the country. The Prince von Wied found it swimming upon rivers in the depths of the primitive forests, and also in still, secluded bays, and upon islands near the sea-coast. Schomburghk observed it at an altitude of 1,500 feet above the level of the sea. During the mid-day heat, and in the afternoon, these birds generally seek out shady places upon the shores and on sandbanks; in the morning and evening they employ themselves in searching for their food, which consists of fishes and snails, also algæ and other water-plants. They invariably pass the night upon trees, and if disturbed in the daytime always seek shelter among their branches; even those which spend their days in marshes and morasses exchange these localities as the sun descends for extensive woods, and perch upon the loftiest trees they can find. Their flight is remarkably rapid, and is always, at their first rising, accompanied by a loud noise, somewhat resembling that produced by a covey of Partridges when first flushed. Their pairing-time seems to be signalised by incessant quarrelling amongst the jealous males; and if the violence of these combats is to be judged of by the number of feathers left upon their battle-fields, they are more than usually pugnacious. Their nest is sometimes built in the hollow of a tree near the sea-shore, sometimes amid the branches. The female parent shows herself most vigilant in protecting her young ones, and should they be attacked, rushes at once to their rescue; when she has succeeded in driving back their enemies she calls them together with a peculiar cry. These birds seem to have two broods during the season--one in May, the other in September.