| Kingdoms / Animalia / Craniata / Aves / Anseriformes / Anatidae / Anser / Species |
| < > Anser anser - Greylag goose (Click photographs/illustrations: full picture & further details) |
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Alternative Names (Synonyms) |
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Graylag Goose |
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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, B25, B26, B27.
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:
Aviornis UK Ringing Scheme suggested average closed ring size: T 20.0mm (D8). |
| Individual Techniques linked in Wildpro |
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External Appearance (Morphology)
Measurement & Weight |
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| Length | 30-35 inches, 76-89cm (B3, B1) | |
| Adult weight | General | 2500-4100g (B1) |
| Male | 2800-4100g (B1); Anser anser anser mean 7.9 lbs. (B8) | |
| Female | 2500-3800g (B1); Anser anser anser mean 6.9 lbs. (B8) | |
| Newly-hatched weight | -- | |
| Growth rate | -- | |
| Adult | Bill | Male | Orange (Anser anser anser); pink (Anser anser rubirostris) |
| Variations (If present) | -- | ||
| Eyes (Iris) | Male | Dark brown. | |
| Variations(If present) | -- | ||
| Juvenile | Bill | As adult. Orange (Anser anser anser); pink (Anser anser rubirostris) | |
| Eyes (Iris) | Dark brown. | ||
| Adult | Male | Pink. |
| Variations (If present) | -- | |
| Juvenile | Pink. | |
| Adult | Male![]() |
Head and neck
grey-brown, neck furrowed. Breast and abdomen paler grey-brown, with slight dark
spotting on abdomen. Flank feathers darker with pale edges; white line along top of
flank. Upperparts darker grey-brown with pale feather edges. Ventral area and tail-coverts white. Rump and tail grey with white border to tail. Wings have pale blueish-grey coverts and grey-black primaries and secondaries. |
Variations (If present)![]() |
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| Juvenile | No spotting on breast. | |
Newly-hatched Characteristics |
| General: Upperparts
brow/olive, underparts yellow. Bill: Grey. Feet: Grey. |
Reproductive Season |
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| Time of year | Begins March/April. |
| No. of Clutches | One, but will lay a second clutch if the first is lost. |
Nest placement and structure |
| On ground in reedbeds, under bushes, in sheltered hollows and on rafts of vegetation. Pile of reeds and grasses, down-lined. |
Egg clutches |
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| No. of Eggs | Average | 4-6 (B1) |
| Range | 2-12 (B1); 4-8 (B8) | |
| Egg Description | Creamy white (B3, B8). Size: 85 x 58mm. Weight: 160g. (B3). | |
| 27-28 days (B1); 28-30 days (B8). |
| Synchronous. |
| 50-60 days (B1); 55-60 days (B8). |
Sexual Maturity |
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| Males | Three, occasionally two years old. |
| Females | Three, occasionally two years old. |
Feeding Behaviour |
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| Adults | Mainly grazes on land, also forages in water, sometimes by up-ending. |
| Newly-hatched | -- |
Parental Behaviour |
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| Nest-building | Often in loose colonies, female builds the nest. |
| Incubation | Female incubates, male stands guard. |
| Newly-hatched | Guarded by both parents, brooded by the female when small; may return to the nest at night. |
| Juveniles | Remain with parents until following breeding season. |
Social Behaviour |
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| Intra-specific | Gregarious, but territorial when nesting. |
| Inter-specific | -- |
Sexual Behaviour |
| Pair bonds strong and permanent once fully formed at three to four years. Occasionally trios formed, usually in semi-captive situations. |
Predation in Wild |
| Sea-eagles sometime take goslings. |
| Roost at night in flocks. | |
| Circadian | Diurnal. |
| Basically vegetarian. Grass, roots, leaves, stems, seed-heads, fruits and sprouts of various plants. In winter also grain, potatoes and other vegetables |
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Distribution and Movement (Migration etc.) |
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| Normal |
Most populations migratory, moving to lower latitudes for winter, further south in very cold winters. Reaches north-west Africa, Asia Minor, India, Burma and northern Indochina. London: In the London Area, "Common feral breeding resident" with nearly 300 birds at Sevenoaks wildfowl reserve in 2000; one humdred or more may be seen in some Inner London locations such as Kensington Gardens. (J322.65.w1) |
| Occasional and Accidental | Accidental to Spitsbergen, Bear Island, Jan Mayen, Israel, Kuwait, Cyprus, Malta, Libya, Morocco, Azores, Madeira, Canary Islands. |
| Introduced | -- |
| Breeding: open country with water which is fringed with vegetation or near grasslands. Winter: open country: farmlands, swamps, lakes, coastal lagoons. |
Intraspecific variation |
| Western Greylag Goose (Anser anser
anser) Eastern Greylag Goose (Anser anser rubrirostris) Domestic goose descended from Anser anser. |
Conservation Status |
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| Wild Population - (Importance) |
Abundant, not threatened (B1). |
| General Legislation |
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| CITES listing | Listing not yet included. |
| Red-data book listing | Listing not yet included. |
| Threats | The main potential threats are hunting and habitat loss from the drainage of wetlands (B1, B8). |
Captive Populations |
| Common in European collections (B8). |
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