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< > Dendrocygna guttata - Spotted whistling-duck (Click photographs/illustrations: full picture & further details)
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INFORMATION AVAILABLE

GENERAL & REFERENCES

EXTERNAL APPEARANCES

REPRODUCTION

BEHAVIOUR

NATURAL DIET

RANGE & HABITAT

CONSERVATION

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General and References

Alternative Names (Synonyms)

Spotted tree duck
Spotted whistle-duck
Tüpfelpfeifgans (German)
Dendrocygne tacheté (French)
Pato silbador moteado (Spanish)
Suirirí Moteado (Spanish)

Names for newly-hatched

Duckling, downy

Names for non-breeding males or other colour-phases

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References

Species Author

Debra Bourne

Major References

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

Aviculture references:
J23.13.w10
B7, B29, B30, B97
D1, D8

Other References

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

Parent Group

Specific Needs Group referenced in Management Techniques

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Aviculture Information

Notes

General information:
Whistling-ducks generally do well, either in pens or in a park with access to extensive water area and good natural cover. They are gregarious outside the breeding season, and groups may bully smaller duck species, so should be kept in large areas, in which other birds have room to escape. Most need shelter in severe weather and a well-sheltered pen with frost-free night quarters for winter is suggested, or plenty of ground cover and/or straw to stand on, as they are susceptible to frostbite. They may be kept fully-flighted in aviaries, and have also been kept full-winged in open pens, tending not to wander. Perches should be provided at an appropriate height for pinioned or wing-clipped birds. Commercial pellets and grain are suitable for feeding.

Elevated nest boxes are appreciated by most species, although pinioned birds will use ground-level boxes; boxes may be placed over water or land. Eggs may be incubated by bantams and ducklings may be bantam-reared. Many species have been successfully parent-reared in captivity. Pairs kept isolated and fully flighted in a covered pen, with high-hung nest boxes "seldom fail to rear broods" (B7). Whistling-duck species may hybridise with one another and therefore should be kept in separate enclosures, and hybridisation has also occasionally been reported with Netta peposaca - Rosy-billed pochard.

(J23.13.w10, B7, B29, B97).

Spotted whistling-ducks are not common in collections; they can be aggressive particularly to other whistling-ducks and are one of the least hardy of the whistling ducks.

This species is rarely bred. They may nest in a ground level or raised nest box and usually lay their eggs in May to June.

(B29, B30, D1).

Aviornis UK Ringing Scheme recommended average closed ring size: L 11.0mm (D8).

Management Techniques

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External Appearance (Morphology)

Measurement & Weight

Length 43-50cm, 17-19 inches (B1, B3).
Adult weight General Average 800g (B1, B3); 1.5lb (B8).
Male --
Female --
Newly-hatched weight --
Growth rate --

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Head

Adult Bill Male Reddish grey.
Variations (If present) --
Eyes (Iris) Male Dark brown.
Variations(If present) --
Juvenile Bill Reddish grey.
Eyes (Iris) Dark brown.

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Legs

Adult Male Reddish grey.
Variations (If present) --
Juvenile Reddish grey.

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Plumage

Adult Male Head and neck: Face and foreneck grey, black around eyes continuing forwards to bill, blackish line along crown and continuing down hindneck.

Breast and flanks chestnut with small white spots on the breast, larger spots outlined in black on the flanks extending to mottled tail coverts

Abdomen and ventral area white.

Upperparts and tail dark brown with rufous edges to feathers.

Wings dark brown.

Variations (If present) --
Juvenile Duller colouring, lacks white spotting on the breast and the flanks appear streaked rather than spotted.

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Newly-hatched Characteristics

General: Dark brown upperparts with two long pale bands on the back; pale underparts; striped face.
Bill: Grey
Feet: Grey

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Reproduction

Reproductive Season

Time of year Begin in September, at the start of the wet season.
No. of Clutches --

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Nest placement and structure

In tall hollow trees, in or near the water.

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Egg clutches

No. of Eggs Average Approximately 11 (B1); 10 (B8).
Range Up to 16 (B8).
Egg Description White. Size: 52 x 38 mm; weight: 49g.

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Incubation

28-31 days (B1, B8).

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Hatching

Synchronous.

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Fledging

Approximately 7 weeks (B1); 45-50 days (B8).

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Sexual Maturity

Males --
Females --

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Behaviour

Feeding Behaviour

Adults Dabble on surface, filter the surface and dive.
Newly-hatched --

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Parental Behaviour

Nest-building --
Incubation Both incubate.
Newly-hatched --
Juveniles

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Social Behaviour

Intra-specific Gregarious. Feed and roost in groups.
Inter-specific --

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Sexual Behaviour

Strong, durable pair bonds may extend for life.

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Predation in Wild

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Activity Patterns

Gather on top of trees to fly to feeding sites.
Circadian Mostly nocturnal.

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Natural Diet

Adults

Grass seeds, small snails.

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Newly-hatched

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Range and Habitat

Distribution and Movement (Migration etc.)

Normal

East Indies and New Guinea: from Sulawesi and southern Philippines (Mindanao, Basilan, Jolo), southward through Mollucas, Tanimbar (Lesser Sundas) to New Guinea & Bismarck Archipelago. Mainly sedentary, non-migratory.

Occasional and Accidental

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Introduced

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Habitat

Lowlands, using the margins lakes, pools, marshes and freshwater swamps, preferably with grassy margins and scattered trees.

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Conservation

Intraspecific variation

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Conservation Status

Wild Population -
(Importance)

Not threatened. Estimated population 10,000-25,000 birds.

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

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Captive Populations

Increasing but not numerous.

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Trade

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