| Kingdoms / Animalia / Craniata / Aves / Anseriformes / Anatidae / Tadorna / Species |
| < > Tadorna tadornoides - Australian shelduck (Click photographs/illustrations: full picture & further details) |
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Alternative Names (Synonyms) |
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| Mountain duck Chestnut-breasted shelduck Australische Kasarka (German) Halsbandkasarka (German) Casarca dAustralie (French) Tadorna dAustralie (French) Oca Australiana (Spanish) Tarro Australiano (Spanish) Casarca tadornoides |
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Names for newly-hatched |
Duckling, downy. |
Names for non-breeding males or other colour-phases |
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Species Author |
Debra Bourne |
Major References |
B1, B3, B4, B8, B19, B25, B26. Aviculture references: |
Other References |
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TAXA Group (where information has been collated for an entire group on a modular basis) |
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Parent Group |
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Specific Needs Group referenced in Management Techniques |
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Aviculture Information |
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Notes |
General information:
Species-specific information:
(J23.13.w7, B29, B29, B40, B94, B95, B97, B128.w2, B139, D1). Aviornis UK Ringing Scheme recommended average closed ring size: R 16.0mm (D8). |
Management Techniques |
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External Appearance (Morphology)
Measurement & Weight |
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| Length | 25-28 inches, 63-71cm (B3); 56-72cm (B1). | |
| Adult weight | General | 0.878-1.980kg (B1). |
| Male | 0.99-1.98kg, average 1.56kg (B3); mean 3.4 lbs. (B8). | |
| Female | 0.88-1.85kg, average 1.29kg (B3); mean 2.8 lbs. (B8). | |
| Newly-hatched weight | -- | |
| Growth rate | -- | |
| Adult | Bill | Male | Black. |
| Variations (If present) | -- | ||
| Eyes (Iris) | Male | Brown. | |
| Variations(If present) | -- | ||
| Juvenile | Bill | Black. | |
| Eyes (Iris) | Brown. | ||
| Adult | Male | Black. |
| Variations (If present) | -- | |
| Juvenile | Black. | |
| Adult | Male | Head and neck black, with white neck ring separating from breast and mantle cinnamon. Upperparts and underparts black, indistinctly vermiculated with brown. Wings have white coverts, chestnut tertials, metallic green secondaries, black primaries. |
| Variations (If present) | Female lacks white neck ring and has a white around the bill and a white patch around the eye. | |
| Juvenile | Duller. Head browner, sometimes whitish feathering between eye and bill; lacks neck-ring. | |
Newly-hatched Characteristics |
| General: Underparts including
most of neck, sides of head and forehead white, upperparts including crown and
hindneck dark brown with white markings on wings and sides of back. Bill: Dark blue-grey. Feet: Dark blue-grey. |
Reproductive Season |
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| Time of year | Begins June/July. |
| No. of Clutches | -- |
Nest placement and structure |
| In tree-hollows, cliffs and on the ground, down lining to nest. |
Egg clutches |
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| No. of Eggs | Average | 8-10 (B1) |
| Range | 5-19 (B1); 5-14 (B8). | |
| Egg Description | Creamy white. Size: 68 x 49mm weight: 93g. | |
| 30-33 days (B1, B8). |
| Synchronous. |
| 50-70 days (B1, B8). |
Sexual Maturity |
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| Males | About two years old. |
| Females | About two years old. |
Feeding Behaviour |
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| Adults | Mainly grazing on land, also dabbling, head-dipping and scything on water. |
| Newly-hatched | -- |
Parental Behaviour |
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| Nest-building | Nest as solitary pairs. |
| Incubation | By female only. |
| Newly-hatched | Tended by both parents. |
| Juveniles | Left by parents usually after fledging, sometimes earlier. |
Social Behaviour |
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| Intra-specific | Territorial while breeding and not generally gregarious but gather to moult. |
| Inter-specific | -- |
Sexual Behaviour |
| Usually strong long-term pair bonds, but pairing may dissolve if breeding is unsuccessful. |
Predation in Wild |
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| Loaf along shorelines. | |
| Circadian | Crepuscular (evening and morning) feeding pattern. |
| Leaves and seeds of plants, sedges, algae, also aquatic invertebrates (insects, crustaceans, molluscs) and small fish. |
| -- |
Distribution and Movement (Migration etc.) |
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| Normal | South-west and south-east Australia, Tasmania. Winters north to south Queensland. Non-migratory but moves to key waters for the moulting season and also moves depending on water availability. |
| Occasional and Accidental | Occasionally to northern Australia and New Zealand. |
| Introduced | -- |
| Breeding: shallow fresh/brackish lakes, lagoons, and marshes with short grasslands and with scattered trees surrounding. Winter: large water bodies, estuaries, sheltered coasts. |
Intraspecific variation |
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Conservation Status |
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| Wild Population - (Importance) |
Widespread and numerous (B1). |
| CITES listing | -- |
| Red-data book listing | -- |
| Threats | -- |
Captive Populations |
| Present in collections although not particularly common (B8). |
| -- |