Kingdoms / Animalia / Craniata / Aves / Anseriformes / Anatidae / Chloephaga / Species
< >  Chloephaga hybrida - Kelp goose (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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(Waterfowl)

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General and References

Alternative Names (Synonyms)

Ouette marine (French)
Bernache antarctique (French)
Kelpgans (German)
Tanggans (German)
Cauquén caranca (Spanish)
Caranca (Spanish)
Ganso del cachiguyo (Spanish)
Patagonian Kelp Goose Chloephaga hybrida hybrida
Falkland Kelp Goose Chloephaga hybrida malvinarum

Names for newly-hatched

Gosling, 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:
B7, B29, B30, B40, B95, B97, B128.w1, B128.w2
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:
  • Sheldgeese are generally hardy, and mostly aggressive particularly in the breeding season, so that pairs require a separate pen. A pen for a pair of these birds may be 80% grazing land to 20% water, with a minimum size of 200 square metres for the smaller species (e.g. Orinoco goose) and 300 square metres for the larger species.
  • Grazing birds, their grass (sward of less than 3 inches 7.5cm preferred) should be supplemented with wheat and pellets outside the breeding season and breeders pellets before and during the breeding season. Additional green food should be provided when there is insufficient grass.
  • Sheltered nest sites may be needed for species which nest early in the year. Ground-level nest boxes, open to the ground, 20x16x16 inches (50x40x40cm), with a ground level entrance hole and containing e.g. dry grass as nesting material.

(B7, B29, B40, B95, B128.w1, D1)

Species-specific information:

  • Kelp geese have been kept in collections very rarely, and bred very rarely, but at least once. Their specialised feeding habits make captive management problematic. Provision of open vegetation and a box or other shelter as a nesting site is suggested.

(B29, B30, B94, B97, B128.w2).

Aviornis UK Ringing Scheme recommended average closed ring size: P 14.0mm, perhaps R 16.0mm, and for males of Chloephaga hybrida malvinarum S 18.0mm (D8).

Management Techniques

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External Appearance (Morphology)

Measurement & Weight

Length 22-25 inches, 55-65cm (B3, B1).
Adult weight General 2041-2607g (B1).
Male 2607g; Chloephaga hybrida malvinarum mean 5.7 lbs., Chloephaga hybrida hybrida slightly less (B8).
Female 2041g (B3); Chloephaga hybrida malvinarum mean 4.5 lbs., Chloephaga hybrida hybrida slightly less (B8).
Newly-hatched weight --
Growth rate --

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Head

Adult Bill Male Black.
Variations (If present) --
Eyes (Iris) Male Brown.
Variations(If present) Yellowy-pink with black nail.
Juvenile Bill Dusky.
Eyes (Iris) Brown.

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Legs

Adult Male Bright yellow.
Variations (If present) --
Juvenile Dusky.

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Plumage

Adult Male White.
Variations (If present) Female: head dark brown with white ring around eye, crown light brown, breast and flanks black with white barring, abdomen and tail white.

Upperparts dark brown, wings white coverts, greater coverts metallic green-black (speculum), secondaries white, primaries blackish, tertials dark brown.

Juvenile Similar to female but more white on head, neck, breast, and no speculum.

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Newly-hatched Characteristics

General: Underparts silver-grey, upperparts have slightly darker patterning.
Bill: Black.
Feet: Black.

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Reproduction

Reproductive Season

Time of year Begin October/November.
No. of Clutches --

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Nest placement and structure

On low rocky outcrops or among vegetation, on the ground, nest of grasses with down lining.

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Egg clutches

No. of Eggs Average --
Range 3-7 (B1, B8).
Egg Description Pale buff or creamy. Size: 73 x 53mm.

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Incubation

30 days (B1, B8).

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Hatching

Synchronous.

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Fledging

12-13 weeks (B1); 84 days (B8).

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Sexual Maturity

Males Three years old.
Females Three years old.

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Behaviour

Feeding Behaviour

Adults Mainly along shoreline, foraging at the water's edge.
Newly-hatched Forage most at low tide.

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Parental Behaviour

Nest-building Nest as single pairs or in loose groups.
Incubation By female, with male guarding.
Newly-hatched Tended by both parents.
Juveniles

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Social Behaviour

Intra-specific Territorial while breeding.
Inter-specific --

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Sexual Behaviour

Strong permanent pair bonds.

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Predation in Wild

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Activity Patterns

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Circadian --

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Natural Diet

Adults

Basically vegetarian. Seaweed and algae main diet, also berries in winter and green grasses when breeding. Small molluscs and crustaceans ingested incidentally.

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Newly-hatched

Filamentous algae.

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Range and Habitat

Distribution and Movement (Migration etc.)

Normal Chloephaga hybrida hybrida Southern Chile and Tierra del Fuego.

Chloephaga hybrida malvinarum Falkland Islands.

Mainland population small-scale movements along Chilean coast and to Atlantic coast of Argentina in winter. Falklands population basically sedentary

Occasional and Accidental

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Introduced

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Habitat

Breeding: coastal freshwater lagoons. Otherwise rocky coasts and shingle beaches.

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Conservation

Intraspecific variation

Patagonian Kelp Goose Chloephaga hybrida hybrida
Falkland Kelp Goose Chloephaga hybrida malvinarum

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Conservation Status

Wild Population -
(Importance)

Not considered threatened.

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

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Captive Populations

Few in collections.

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Trade

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