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< >  Anas specularis - Spectacled 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)

Bronze-winged duck
Kupferspiegelente (German)
Canard lunettes (French)
Canard aux ailes bronzies (French)
Anade anteojillo (Spanish)
Pato anteojillo (Spanish)
Pato perro (Spanish)
Speculanas specularis

Names for newly-hatched

Duckling, downy.

Names for non-breeding males or other colour-phases

Eclipse

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References

Species Author

Debra Bourne

Major References

B1, B3, B5, B8, B19, B25.

Aviculture references:
J23.13.w7
B7, B29, B30, B40, B94, B128.w1
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:
  • Dabbling Ducks are generally hardy, easy to maintain and easy to breed. Shelter may be required by some of the smaller species in winter. They should be provided with cover (including marginal pond cover) and loafing areas as well as water. A pen which is 50% water is suggested. The water may be shallow (i.e. no more than two feet deep is required), and muddy areas for dabbling in are also appreciated. These ducks are generally good in mixed collections, although the smaller and quieter species may be bullied. Territorial disputes between ducks of the same species may be avoided by keeping only one pair of each species in an enclosure, unless the area is very large. For a single pair of ducks a pen are of 50 to 100 square metres, depending on the size of duck, should be provided.
  • A diet based on wheat and pellets is suggested, with maintenance pellets changed to breeders pellets for the breeding season. Bread and greenfood are also appreciated. Grit should always be available, with soluble grit (e.g. oystershell grit) as a calcium source when breeding.
  • Most species are ground nesters and both close ground cover and ground level nest boxes should be provided. Hand-rearing is generally preferred, as these ducks are generally poor parents in captive conditions, particularly in enclosures shared with other waterfowl. These ducks are prone to hybridization, particularly with closely related species, which should be kept apart from one another.

(B7, B29, B30, B40, B94, B128.w1, D1)

Species-specific information:

  • Spectacled ducks (Bronze-winged duck) are territorial and aggressive; they require a separate enclosure. Cover and loafing areas should be available as well as a water area.
  • These ducks are fairly easy to breed; they may nest in good ground cover, a ground-level nest box or a buried nest box with pipe entrance.

(J23.13.w7, B29, B30, B94, D1).

Aviornis UK Ringing Scheme recommended average closed ring size: M 12.0mm (D8).

Management Techniques

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External Appearance (Morphology)

Measurement & Weight

Length 21 inches 54cm (B3); 46-54cm (B1).
Adult weight General About 960g (B1).
Male About 2.5 lbs. (B8).
Female Mean 2.2 lbs. (B8).
Newly-hatched weight --
Growth rate --

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Head

Adult Bill Male Dark slate grey, with black nail.
Variations (If present) --
Eyes (Iris) Male Brown.
Variations(If present) --
Juvenile Bill Dark slate grey, with black nail.
Eyes (Iris) Brown.

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Legs

Adult Male Orange-yellow with dusky webs.
Variations (If present) --
Juvenile Orange-yellow with dusky webs.

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Plumage

Adult Male Head and neck blackish brown, white oval patch between eye and bill, larger white chain and throat patch extending up either side of neck. Lower neck, breast, abdomen, tail-coverts and rump dull brown with buff feather edges, tail blackish. Flanks dull brown with black-brown feather centres: ‘scalloped’ appearance. Upperparts blackish-brown, mantle feathers buff fringed.

Wing dark brown to purple-black, secondaries iridescent pinkish-bronze, with a black subterminal border, white tips.

Variations (If present) Female duller.
Juvenile White on face reduced or absent, breast heavily streaked.

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Newly-hatched Characteristics

General: Upperparts black-brown.

Bill: Dark grey.
Feet: Dark grey.

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Reproduction

Reproductive Season

Time of year Begins September/October.
No. of Clutches --

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Nest placement and structure

On river islets, on the ground in tall dense grass, down-lined nest.

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Egg clutches

No. of Eggs Average --
Range 4-6 (B1, B8).
Egg Description Deep cream. Size: 64 x 44mm, weight: 75g (B3).

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Incubation

30 days (B1, B8).

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Hatching

Synchronous.

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Fledging

About 100 days (B8).

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Sexual Maturity

Males  
Females  

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Behaviour

Feeding Behaviour

Adults Wade and probe at waters edge, graze on land.
Newly-hatched --

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Parental Behaviour

Nest-building Nest as solitary pairs.
Incubation By female only.
Newly-hatched Both parents tend the brood.
Juveniles

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Social Behaviour

Intra-specific Usually found in pairs or family groups.
Inter-specific --

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Sexual Behaviour

Pair bond strong and probably long-term.

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Predation in Wild

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Activity Patterns

Fly following river courses.
Circadian --

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Natural Diet

Adults

Seeds, leaves and stems of aquatic plants, also aquatic invertebrates (insects and their larvae, molluscs).

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Newly-hatched

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Range and Habitat

Distribution and Movement (Migration etc.)

Normal

Southern Chile and west-central Argentina southward to Tierra del Fuego.

Disperse north and east to Buenos Aires Province (Argentina), Santiago (Chile). Some stay in breeding territory.

Occasional and Accidental

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Introduced

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Habitat

Fast-flowing rivers in dense forests preferred, also adjacent standing-water wetlands, slower streams.

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Conservation

Intraspecific variation

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Conservation Status

Wild Population -
(Importance)

Widespread but not numerous (B1).

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

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Captive Populations

Not common in collections (B8).

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Trade

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