| Kingdoms / Animalia / Craniata / Aves / Anseriformes / Anatidae / Branta / Species |
| < > Branta bernicla - Brent goose (Click photographs/illustrations: full picture & further details) |
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Alternative Names (Synonyms) |
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| Brant Brant goose Brent Bernache cravant (French) Ringelgans (German) Barnacla carinegra (Spanish) Branta (Spanish) Rotgans (Dutch) Prutgås (Swedish) Light-bellied Brent Branta bernicla hrota Atlantic Brent Branta bernicla hrota Dark-bellied Brent Branta bernicla bernicla Russian Brent Branta bernicla bernicla Black Brent Branta bernicla nigricans Pacific Brent Branta bernicla nigricans (Lawrence's Brent Branta bernicla orientalis)= B. nigricans Branta nigricans Black Brent Bernicla brenta |
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Names for newly-hatched |
Gosling, downy. |
Names for non-breeding males or other colour-phases |
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Species Author |
Debra Bourne |
Major References |
B1, B2, B3, B4, B8, B19, B24,
B25
Other references: Aviculture references: |
ORGANISATIONS |
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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:
(B7, B29, B30, B40, B94, B95, B108, B128.w1, B129, D1) Species-specific information:
(B29, B30, B31, B94, B97, B129). Aviornis UK Ringing Scheme suggested average closed ring size: P 14.0mm (orientalis 12.0mm) (D8). |
| Individual Techniques linked in Wildpro |
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External Appearance (Morphology)
Measurement & Weight |
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| Length | 22-26 inches, 55-66cm (B3, B1). | |
| Adult weight | General | 1200-2250g (B1). |
| Male | 1400-2250g (B3). | |
| Female | 1200-1769g (B3). | |
| Newly-hatched weight | -- | |
| Growth rate | -- | |
| Adult | Bill | Male | Black. |
| Variations (If present) | -- | ||
| Eyes (Iris) | Male | Dark brown. | |
| Variations(If present) | -- | ||
| Juvenile | Bill | Black. | |
| Eyes (Iris) | Dark brown. | ||
| Adult | Male | Black. |
| Variations (If present) | -- | |
| Juvenile | Black. | |
| Adult | Male | Head, neck and breast
black, with small white line/narrow patch diagonally high on sides of neck. Upperparts and wings dark grey-brown, flight feathers black. Tail black, ventral region and elongated tail-coverts white. Abdomen and flanks grey-brown, flanks and sides of abdomen with pale feather tips forming bars. |
| Variations (If present) | Branta bernicla nigricans
darker: abdomen and flanks dark brown with white feather edges on flanks. White
patches on neck meet on foreneck. Branta bernicla hrota paler: abdomen and flanks whitish with dark barring on rear flanks. |
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| Juvenile | White edges to underparts, less white markings on throat. | |
Newly-hatched Characteristics |
| General: Upperparts grey,
underparts whitish. Bill: Dark grey. Feet: Dark grey. |
Reproductive Season |
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| Time of year | Begins June. |
| No. of Clutches | -- |
Nest placement and structure |
| On the ground, usually close to water, a shallow depression with a lining of grass, moss and down. |
Egg clutches |
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| No. of Eggs | Average | 3-5 (B1) |
| Range | 1-10 (B1); 3-5 (B8) | |
| Egg Description | Cream, yellowish, greenish or pale olive (B3, B8). Size: 75 x47mm. (B3). | |
| About 24-26 days (B1); 22-28 (mean 24) days (B8). |
| Synchronous. |
| About 40 days (B1); 40-50 days (B8). |
Sexual Maturity |
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| Males | Two to three years old. |
| Females | Two to three years old. |
Feeding Behaviour |
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| Adults | Grazes on land, also feeds in shallow water, swimming and up-ending. Usually feeds in flocks outside breeding season |
| Newly-hatched | -- |
Parental Behaviour |
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| Nest-building | In colonies. Build by both birds. |
| Incubation | By female only. |
| Newly-hatched | Tended by both parents. |
| Juveniles | Remain with parents until following breeding season. |
Social Behaviour |
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| Intra-specific | Gregarious. Found in flocks except in breeding season. |
| Inter-specific | Sometimes nest near Snowy owl as a protection against Arctic foxes. |
Sexual Behaviour |
| Strong permanent pair bond. |
Predation in Wild |
| Arctic fox. |
| Daily feeding and resting patterns depend on the tides (since feeding on moist intertidal flats), therefore may feed and rest at any time of the day or night. | |
| Circadian | -- |
| Basically vegetarian. Breeding season: grasses, mosses, lichens and aquatic plants. Winter: marine algae, seaweed and other aquatic plants. |
| -- |
Distribution and Movement (Migration etc.) |
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| Normal |
Migratory to north-west Europe and south to Mediterranean region; eastern Asia (around Yellow Sea) including Japan, China; North America (Atlantic and Pacific coasts). Seen further south in very cold winters. London: In the London Area, "formerly scarce migrant and winter visitor, greatly increased in recent years." Seen at various reservoirs, Rainham Marsh, The Wetland Centre at Barnes (WWT) and other sites. (J322.65.w1) |
| Occasional and Accidental | Rarely to north Africa and Hawaiian Islands. |
| Introduced | -- |
| Breeding: low Arctic tundra, near coast. Winter: estuaries and sandy shores. Moist inter-tidal flats provide a major feeding area. |
Intraspecific variation |
| Light-bellied Brent Branta bernicla
hrota Atlantic Brent Branta bernicla hrota Dark-bellied Brent Branta bernicla bernicla Russian Brent Branta bernicla bernicla Black Brent Branta bernicla nigricans Pacific Brent Branta bernicla nigricans Lawrence's Brent Branta bernicla orientalis |
Conservation Status |
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| Wild Population - (Importance) |
Not considered threatened (B1). |
| CITES listing | -- |
| Red-data book listing | -- |
| Threats | -- |
Captive Populations |
| Reasonable well represented in collections (B8). |
| -- |