16-604: T. ferruginea T. cana T. tadornoides T. variegata T. cristata T. tadorna see text The shelducks , most species of which are found in the genus Tadorna (except for the Radjah shelduck , which is now found in its own monotypic genus Radjah ), are a group of large birds in the Tadorninae subfamily of the Anatidae , the biological family that includes the ducks and most duck-like waterfowl such as
32-563: A pamphlet in 1900 in which he supported the control of house sparrows. In 1930, Hartert retired to Berlin , where he died in 1933. Hartert had been a mentor to Erwin Stresemann , whose cremated remains were interred at Hartert's grave in 1972. Among the written publications of Ernst Hartert are: A species of lizard, Hemiphyllodactylus harterti , and 12 birds are named in his honor. [REDACTED] Media related to Ernst Hartert at Wikimedia Commons This article about
48-973: Is a species of shelduck found mostly in New Guinea and Australia , and also on some of the Moluccas . It is known alternatively as the raja shelduck , black-backed shelduck , or in Australia as the Burdekin duck . The specific name radjah is from the Moluccan name Radja for the radjah shelduck on the island of Buru in Indonesia. Formerly placed in the genus Tadorna , it differs markedly from other members in external morphology and mtDNA cytochrome b sequence data, suggesting its status should be reinvestigated. Current classification places it in its own monotypic genus Radjah . Both
64-540: Is about 30 days. Ernst Hartert Ernst Johann Otto Hartert (29 October 1859 – 11 November 1933) was a widely published German ornithologist . Hartert was born in the Free and Hanseatic City of Hamburg on 29 October 1859. In July 1891, he married the illustrator Claudia Bernadine Elisabeth Hartert in Frankfurt am Main , Germany, with whom he had a son named Joachim Karl (Charles) Hartert, (1893–1916), who
80-740: Is based on the HBW and BirdLife International Illustrated Checklist of the Birds of the World . [REDACTED] Male [REDACTED] Female [REDACTED] Male [REDACTED] Female [REDACTED] Male [REDACTED] Female [REDACTED] Male [REDACTED] Female [REDACTED] Male [REDACTED] Female [REDACTED] Radjah shelduck R. r. radjah (Lesson, RP, 1828) R. r. rufitergum ( Hartert , 1905) Tadorna radjah The radjah shelduck ( Radjah radjah ),
96-652: The Moluccas in eastern Indonesia . In Australia, its primary range is coastal, tropical northern Australia, extending as far south as central Queensland , west through the upper regions of the Northern Territory (including Kakadu National Park ) to the Kimberley in Western Australia . The radjah shelduck is listed as a protected bird in all the states of Australia, and penalties are enforced for harming or disturbing them. The species prefers
112-443: The geese and swans . Shelducks are a group of large, often semi-terrestrial waterfowl, which can be seen as intermediate between geese ( Anserinae ) and ducks. They are mid-sized (some 50–60 cm) Old World waterfowl. The sexes are colored slightly differently in most species, and all have a characteristic upperwing coloration in flight: the tertiary remiges form a green speculum , the secondaries and primaries are black, and
128-707: The Tadorninae, Tadorna is very close to the Egyptian goose and its extinct relatives from the Madagascar region, Alopochen . While the classical shelducks form a group that is obviously monophyletic , the interrelationships of these, the aberrant common and especially Radjah sheducks, and the Egyptian goose were found to be poorly resolved by mtDNA cytochrome b sequence data; this genus may thus be paraphyletic . The Radjah sheduck, formerly placed in
144-429: The coverts (forewing) are white. Their diet consists of small shore animals ( winkles , crabs etc.) as well as grasses and other plants. They were originally known as " sheldrakes ", which remained the most common name until the late 19th century. The word is still sometimes used to refer to a male shelduck and can also occasionally refer to the canvasback ( Aythya valisineria ) of North America. The genus Tadorna
160-957: The genus Tadorna , is now placed in its own monotypic genus: Fossil bones from Dorkovo ( Bulgaria ) described as Balcanas pliocaenica may actually belong to this genus. They have even been proposed to be referable to the common shelduck, but their Early Pliocene age makes this rather unlikely. Based on the Taxonomy in Flux from John Boyd's website. Radjah radjah (Lesson 1828) Reichenbach 1852 (Radjah shelduck) Alopochen Stejneger 1885 ?† T. cristata (Kuroda 1917) (Crested shelduck) T. tadorna (Linnaeus 1758) (Common shelduck) T. cana (Gmelin 1789) (South African shelduck) T. ferruginea (Pallas 1764) (Ruddy shelduck) T. tadornoides (Jardine & Selby 1828) (Australian shelduck) T. variegata (Gmelin 1789) (Paradise shelduck) The following table
176-486: The male and female of the species are mostly white, with dark wing-tips and a distinctive "collar" of dark feathers. When viewed from above, during flight or with wings outstretched, green bands are visible on the tops of their wings. To communicate, the female utters a harsh rattle while the male emits a breathy, "sore-throat" whistle. The radjah shelduck inhabits the mangrove forests and coastline of New Guinea ( West Papua and Papua New Guinea ) and Australia, and some of
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#1732783704256192-437: The months of January and February. They nest close to their primary food source, often in the hollow limbs of dead or dehydrated trees, which makes habitat destruction a particular issue. The radjah shelduck does not use nesting materials apart from some self-supplied down feathers. Egg-laying is usually completed by May or June, but depends on the extent of the wet season . The clutches range from 6 to 12 eggs. Incubation time
208-551: The quarterly museum periodical Novitates Zoologicae (1894–39) with Rothschild, and the Hand-List of British Birds (1912) with Francis Charles Robert Jourdain , Norman Frederick Ticehurst and Harry Forbes Witherby . He wrote Die Vögel der paläarktischen Fauna (1910–22) and travelled in India , Africa , and South America on behalf of his employer. Although Hartert supported the conservation of some species of birds, he wrote
224-649: The salty waters of mangrove flats and paperbark tree swamps, but will visit all manner of brackish and freshwater swamps , lagoons , lakes , estuaries , river deltas , and billabongs further inland during the wet season. The radjah shelduck forms long-term, bonded pairs, and they are usually encountered in lone pairs or small flocks. During the rainy season, the males commonly become very irritable, and have been observed attacking their mates. The ducks' preferred diet consists mainly of mollusks , aquatic or other insects, worms, aquatic weeds, sedge materials and algae . Pairs start searching for nesting sites during
240-631: Was introduced by the German zoologist Friedrich Boie in 1822. The type species is the common shelduck . The genus name comes from the French name Tadorne for the common shelduck. It may originally derive from Celtic roots meaning "pied waterfowl", essentially the same as the English "shelduck". A group of them is called a "dopping," taken from the Harley Manuscript . The namesake genus of
256-645: Was killed as an English soldier on the Somme. Together with his wife, he was the first to describe the blue-tailed Buffon hummingbird subspecies ( Chalybura buffonii intermedia Hartert, E & Hartert, C, 1894). The article On a collection of Humming Birds from Ecuador and Mexico appears to be their only joint publication. Hartert was employed by Walter Rothschild, 2nd Baron Rothschild as ornithological curator of Rothshild's private Natural History Museum at Tring , in England from 1892 to 1929. Hartert published
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