J. F. Gmelin, 1789,
Apparently closely related to A. luzonica, A. zonorhyncha and A. poecilorhyncha. Probable unstable hybrids of present species and A. platyrhynchos, found on some Micronesian islands, have been considered a different species, Mariana Duck (A. oustaleti). Hybridization with several species of Anas recorded in captivity, and with at least A. platyrhynchos (producing fertile progeny) in the wild; in New Zealand more than 25% of population may be hybrids. In survey of Lord Howe I in 2007, no pure individuals of present species were found, but A. platyrhynchos had supplanted native A. superciliosa and become dominant: 81% of ducks were platyrhynchos or platyrhynchos-like hybrids, 17% intermediate hybrids, and just 2% superciliosa-like hybrids#R. Several races described, including rogersi (Indonesian region, S New Guinea, Australia), pelewensis (N New Guinea and islands of SW Pacific), and, from Chuuk, rukensis (generally synonymized with pelewensis), leaving nominate superciliosa in New Zealand and on island groups of Chatham, Bounty, Antipodes, Snares, Auckland and Campbell; all poorly defined and considered barely, if at all, diagnosable#R. In view also of extensive hybridization, it seems unwise to persist in recognizing subspecies#R. Treated as monotypic.
Sumatra, Java, Bali, Kangean Is, Sulawesi, Moluccas, Lesser Sundas (E to Timor), New Guinea, Bismarck Archipelago, Solomon Is, Australia, Tasmania, New Zealand (including larger offshore islands), and SW Pacific Is (E to W French Polynesia).
Food and feeding
Status and conservation
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