Kingdoms / Animalia / Craniata / Aves / Anseriformes / Anatidae / Tadorna / Species
< >  Tadorna tadornoides - Australian shelduck (Click photographs/illustrations: full picture & further details)
Click Photo for full-page view

INFORMATION AVAILABLE

GENERAL & REFERENCES

EXTERNAL APPEARANCES

REPRODUCTION

BEHAVIOUR

NATURAL DIET

RANGE & HABITAT

CONSERVATION

Click image to return to Waterfowl Contents FlowchartCONTENTS
(Waterfowl)

Click image for list of Waterfowl Species

Click image for list of Waterfowl Agents
Click image for list of Waterfowl Diseases
Click image for list of Waterfowl Environmental Events / Factors

Return to top of page

General and References

Alternative Names (Synonyms)

Mountain duck
Chestnut-breasted shelduck
Australische Kasarka (German)
Halsbandkasarka (German)
Casarca d’Australie (French)
Tadorna d’Australie (French)
Oca Australiana (Spanish)
Tarro Australiano (Spanish)
Casarca tadornoides

Names for newly-hatched

Duckling, downy.

Names for non-breeding males or other colour-phases

--

Return to top of page

References

Species Author

Debra Bourne

Major References

B1, B3, B4, B8, B19, B25, B26.

Aviculture references:
J23.13.w7
B7, B29, B30, B31, B40, B94, B95, B97, B128.w1, B128.w2, B139
D1, D8

Other References

--
Click image for main Reference Section

Return to top of page

TAXA Group (where information has been collated for an entire group on a modular basis)

Parent Group

Specific Needs Group referenced in Management Techniques

Return to top of page

Aviculture Information

Notes

General information:
  • Shelducks are generally hardy. Their pen should contain short grass for grazing, and they appreciate a degree of cover. Minimum enclosure size suggested for a pair of shelduck is 100 square metres.
  • They tend to be aggressive particularly in the breeding season, and may even kill small ducks, and a separate enclosure is usually required. There is some species-based and individual variation in degree of aggression.
  • Most species prefer to use a partially-buried nest box with a tunnel entrance, usually in the form of a drain pipe. A suggested nest box size is 12x12x14 inches (30x30x40cm), with a six inch (15cm) diameter entrance tunnel drain pipe, or 6x6 inches (15x15cm) square entrance tunnel, minimum 12 inches (30cm) long. Ground-level nest boxes with a six-inch (15cm) diameter entrance hole may also be used.

(B29, B40, B94, B128.w1,D1)

Species-specific information:

  • Reasonably hardy, but shelter should be available in winter. Enclosure should contain grass for grazing; generally peaceable and may be kept in mixed collections with e.g. Anser spp. and large ducks; some individuals are seasonally aggressive and may require a separate enclosure. In general younger birds (less than three years old) may be less aggressive than older birds. In addition to grass, feeding with e.g. wheat and pellets suggested, also earthworms, insects and extra green food for breeding, with duckweed particularly for ducklings.
  • Not always easy to breed. Good fertility and hatchability in Australia. Ground-buried nest boxes, and buried or vegetation-hidden hollow logs and drainpipes should be provided for breeding, unless hollow trees or rabbit burrows are available. Laying may begin in February (northern hemisphere) (B29), usually lay March to May (B29) (June to September in captivity in Australia B139). Duckweed and rearing diet, plus small grains later, are useful for rearing ducklings. Artificial, broody and parent incubation and rearing may be used successfully. Care should be taken to avoid imprinting, which may lead to males aggressive to humans and females attracted to people.
  • Hybrids reported with Tadorna tadorna - Common shelduck, Tadorna ferruginea - Ruddy shelduck, Tadorna cana - South African shelduck, Tadorna variegata - Paradise shelduck, Chloephaga poliocephala - Ashy-headed goose Anser indicus - Bar-headed goose and domestic duck (B31, B139).

(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

--
Click image for main Aviculture Section

Return to top of page

External Appearance (Morphology)

Measurement & Weight

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 --

Return to top of page

Head

Adult Bill Male Black.
Variations (If present) --
Eyes (Iris) Male Brown.
Variations(If present) --
Juvenile Bill Black.
Eyes (Iris) Brown.

Return to top of page

Legs

Adult Male Black.
Variations (If present) --
Juvenile Black.

Return to top of page

Plumage

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.

Return to top of page

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.

Return to top of page

Reproduction

Reproductive Season

Time of year Begins June/July.
No. of Clutches --

Return to top of page

Nest placement and structure

In tree-hollows, cliffs and on the ground, down lining to nest.

Return to top of page

Egg clutches

No. of Eggs Average 8-10 (B1)
Range 5-19 (B1); 5-14 (B8).
Egg Description Creamy white. Size: 68 x 49mm weight: 93g.

Return to top of page

Incubation

30-33 days (B1, B8).

Return to top of page

Hatching

Synchronous.

Return to top of page

Fledging

50-70 days (B1, B8).

Return to top of page

Sexual Maturity

Males About two years old.
Females About two years old.

Return to top of page

Behaviour

Feeding Behaviour

Adults Mainly grazing on land, also dabbling, head-dipping and scything on water.
Newly-hatched --

Return to top of page

Parental Behaviour

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.

Return to top of page

Social Behaviour

Intra-specific Territorial while breeding and not generally gregarious but gather to moult.
Inter-specific --

Return to top of page

Sexual Behaviour

Usually strong long-term pair bonds, but pairing may dissolve if breeding is unsuccessful.

Return to top of page

Predation in Wild

--

Return to top of page

Activity Patterns

Loaf along shorelines.
Circadian Crepuscular (evening and morning) feeding pattern.

Return to top of page

Natural Diet

Adults

Leaves and seeds of plants, sedges, algae, also aquatic invertebrates (insects, crustaceans, molluscs) and small fish.

Return to top of page

Newly-hatched

--

Return to top of page

Range and Habitat

Distribution and Movement (Migration etc.)

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

--

Return to top of page

Habitat

Breeding: shallow fresh/brackish lakes, lagoons, and marshes with short grasslands and with scattered trees surrounding. Winter: large water bodies, estuaries, sheltered coasts.

Return to top of page

Conservation

Intraspecific variation

--

Return to top of page

Conservation Status

Wild Population -
(Importance)

Widespread and numerous (B1).

CITES listing --
Red-data book listing --
Threats --

Return to top of page

Captive Populations

Present in collections although not particularly common (B8).

Return to top of page

Trade

--

Return to top of page