White-backed Duck

SCI Name:  Thalassornis leuconotus
Protonym:  Thalassornis leuconotus Monogr.Anatidae p.168
Taxonomy:  Anseriformes / Anatidae / Thalassornis
Taxonomy Code:  whbduc1
Type Locality:  Cape of Good Hope.
Author:  Eyton
Publish Year:  1838
IUCN Status:  Least Concern

DEFINITIONS

THALASSORNIS
(Anatidae; Ϯ White-backed Duck T. leuconotus) Gr. θαλασσα thalassa, θαλασσης thalassēs  sea; ορνις ornis, ορνιθος ornithos  bird; despite this generic tag the White-backed Duck, an aberrant Afrotropical diving duck, is found only on shallow freshwater lagoons and pools, backwaters and floodplains; "THALASSORNIS nobis.  TYPE. Thalassornis leuconotus.  Affinity. The above genus appears to form a connecting link between the genus Clangula and Biziura, the structure of the tail being nearly that of the former genus, while the bill is that of the latter." (Eyton 1838).
Var. Thalassiornis.

leuconotos / leuconotus
Gr. λευκος leukos  white; -νωτος -nōtos  -backed  < νωτον nōton  back.

SUBSPECIES

White-backed Duck (leuconotus)
SCI Name: Thalassornis leuconotus leuconotus
leuconotos / leuconotus
Gr. λευκος leukos  white; -νωτος -nōtos  -backed  < νωτον nōton  back.

White-backed Duck (insularis)
SCI Name: Thalassornis leuconotus insularis
insularis
L. insularis  of an island  < insula, insulae  island.
● Ceylon (= Sri Lanka) (syn. Accipiter badius, subsp. Chloropsis aurifrons, subsp. Dicrurus caerulescens, subsp. Prinia inornata).
● New Caledonia (syn. Accipiter fasciatus vigilax).
● Phu-Quoc I., Cochin China (=Vietnam) (subsp. Aethopyga siparaja).
● Andaman Is., Bay of Bengal (subsp. Amaurornis phoenicurus).
● Bahrain, Arabian Gulf (subsp. Ammomanes deserti)
● Erroneous TL. Madagascar (= Zanzibar) (subsp. Andropadus importunus).
● Santa Cruz I., Channel Is., California, USA (subsp. Aphelocoma californica, subsp. Eremophila alpestris).
● Rennell I., Solomon Is. (Aplonis).
● Jobi I. (= Japen = Yapen), New Guinea (Arses, subsp. Pachycephalopsis hattamensis).
● Sardinia (Bubo).
● Fernando Póo (= Bioko), Gulf of Guinea (syn. Campethera tullbergi, syn. Cinnyris chloropygius).
● Isla Cozumel, Quintana Roo, Mexico (syn. Cathartes aura, subsp. Cyclarhis gujanensis).
● Aldabra, Indian Ocean (subsp. Centropus toulou).
● Sardinia (syn. Coccothraustes coccothraustes).
● Grand Cayman, Caribbean Sea (subsp. Columbina passerina).
● New Britain, Bismarck Archipelago, Papua New Guinea (Corvus).
● Formosa/Taiwan (subsp. Dendrocopos leucotos, Myophonus, syn. Garrulus bispecularis).
● Borneo (syn. Dicrurus paradiseus).
● Nicobar Is., Bay of Bengal (syn. Ducula aenea nicobarica).
● Corsica (syn. Emberiza calandra, syn. Saxicola rubicola).
● Socotra (subsp. Emberiza tahapisi, Passer).
● Weda Is., Halmahera, Indonesia (syn. Eos squamata).
● Tres Marías Is., Nayarit, Mexico (Forpus, subsp. Myadestes occidentalis, subsp. Nyctidromus albicollis, subsp. Pachyramphus aglaiae, subsp. Setophaga pitiayumi, syn. Zenaida asiatica).
● Lord Howe I., Tasman Sea (syn. Fregetta grallaria, ‡Gerygone).
● Rottnest I., Western Australia (syn. Gavicalis virescens).
● Meco I., Quintana Roo, Mexico (subsp. Habia fuscicauda).
● Ship I., off Gulfport, Mississippi, USA (syn. Hirundo rustica erythrogaster).
● Tobago (Hylophilus, subsp. Platyrinchus mystaceus, subsp. Psarocolius decumanus).
● Isla Guadalupe, Baja California, Mexico (Junco).
● Isla Margarita, Venezuela (syn. Leptotila verreauxi,  subsp. Quiscalus lugubris).
● New Providence, Bahamas (sym. Leuconotopicus villosus maynardi).
● King I., Bass Strait, Australia (syn. Melithreptus brevirostris).
● Kangean Is., Java Sea, Indonesia (subsp. Oriolus chinensis).
● Fergusson I., D'Entrecasteaux Is., Papua New Guinea (Otidiphaps).
● Mahé I., Seychelles (Otus).
● Kodiak I., Alaska, USA (subsp. Passerella unalaschcensis).
● Honshu, Japan (subsp. Periparus ater).
● Stewart I., New Zealand (syn. Poodytes punctatus).
● Henderson I., Pitcairn Group, Pacific Ocean (Ptilinopus).
● Naochow I., Kwangtung, China (syn. Pycnonotus aurigaster resurrectus).
● Banggai I., North Borneo (syn. Pycnonotus plumosus hachisukae).
● Madagascar (Sarothrura, subsp. Thalassornis leuconotus).
● Forsyth I., Bass Strait, Australia (syn. Sericornis frontalis).
● Grand Bahama I., Bahamas (Sitta).
● Trinidad (syn. Sporophila intermedia).
● Nias I., Sumatra (subsp. Terpsiphone affinis).
● Terangan I., Aru Is., Indonesia (syn. Todiramphus macleayii).
● Isla Socorro, Colima, Mexico (syn. Troglodytes sissonii).
● Erroneous TL. São Vicente, Cape Verde Is. (= St. Vincent, West Indies) (subsp. Tyto glaucops).
● Vancouver I., British Columbia, Canada (syn. Vireo huttoni).
● Stephens I., Cook Strait, New Zealand (‡syn. Xenicus lyalli).
● Curaçao, Dutch Antilles (subsp. Zonotrichia capensis).
● Tanegashima, south of Kyushu, Japan (subsp. Zosterops japonicus).