Kingdoms / Animalia / Craniata / Aves / Anseriformes / Anatidae / Aythya / Species
< >  Aythya baeri - Baer's pochard (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)

Baer’s white-eye
Siberian white-eye
Asiatic white-eyed pochard
Eastern white-eyed pochard
Baermoorente (German
Schwarzkopfmoorente (German)
Fuligule de Baer (French)
Milouin de Baer (French)
Porrón de Baer (Spanish)
Pato ojos blancos de Baer (Spanish)
Aythya nyroca baeri

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, B6, B8, B19, B25, B26, B4, B44.9.w1.

Aviculture references:
B29, B30, B40, B44.9.w1, B94, B128.w1
D1, D8.

Other References

W2
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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:
  • Pochards are diving ducks which spend most of their time on water, and are ungainly on land. They are generally hardy, sociable and easy to maintain in captivity. They should be kept with deep water available for diving, three to seven feet suggested (B29), or at least half the area 60cm and preferably one metre deep (D1), with shallow sloping banks for easy exit from the water, also islands, good marginal vegetation and loafing areas. Water providing a good supply of natural animal and vegetable food is preferred.
  • These ducks may be kept in mixed collections with dabbling ducks, including smaller species such as teal. They should be fed wheat in water, encouraging their natural diving behaviour. Pellets should also be fed. They may breed better if a group rather than single pair kept, as this allows their normal group displaying activity.
  • 12x12x14 inch (30x30x35cm) nest box with 5 inch (12.5cm) entrance hole suggested, placed under cover at the edge of the pond (B128.w1).

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

Species-specific information:

  • Baer's pochard are relatively easy to keep and breed, nesting in close ground cover or in ground-level nest boxes. Eggs are usually laid April to June.

(B29, B30, B44.9.w1, B94).

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

Management Techniques

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External Appearance (Morphology)

Measurement & Weight

Length 18 inches, 46cm (B3); 46-47cm (B1)
Adult weight General 680-880g (B1).
Male About 880g (B3); mean 1.9 lbs. (B8).
Female About 680g (B3); mean 1.5 lbs. (B8).
Newly-hatched weight --
Growth rate --

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Head

Adult Bill Male Blue-grey, pale subterminal and black nail (B3, B6, B8, B25, B26)
Variations (If present) Grey, nail black (B3, B6, B25).
Eyes (Iris) Male White/very pale yellow (B3, B6, B25, B26).
Variations(If present) Female: brown (B3, B6, B25).
Juvenile Bill Grey, with black nail (B3, B6, B25).
Eyes (Iris) Brown (B3, B6, B25)

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Legs

Adult Male Grey (B2, B6, B25, B26).
Variations (If present) --
Juvenile Grey (B2, B6, B25).

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Plumage

Adult Male Head and upper neck glossy green-black, with white spot on chin lower neck and breast dark chestnut-brown, upper flanks mid brown, with lower flanks (particularly cranially) and abdomen white; undertail coverts white, tail, uppertail coverts, rump and upperparts black-brown. Wing coverts black-brown, secondaries and primaries white, with outer primaries and tips dark brown (B3, B6, B8, B25, B26).
Variations (If present) Female:- similar to male, but duller, browner: head brown-black, paler brown spot by bill, some white on throat, less white on flanks (B3, B6, B25).

Eclipse:-similar to female but darker head and retains pale eye (B3, B6, B25).

Juvenile Similar to female but duller; head buff-brown with darker crown and hindneck, abdomen browner (B3, B6, B25).

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Newly-hatched Characteristics

General: Upperparts brown, underparts including face pale yellow (between Aythya nyroca and Aythya australis) (B3).
Bill: Grey (B3).
Feet: Grey (B3).

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Reproduction

Reproductive Season

Time of year In local spring (B1); probably starting in May (B8); May to July (B25).
No. of Clutches --

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Nest placement and structure

Banks of streams and shores of lakes, in vegetation cover, down-lined (B3, B6, B8, B25, B26).

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Egg clutches

No. of Eggs Average --
Range 6-10 (B1, B8)
Egg Description Cream, yellowish-grey or pale brown (B3, B6, B8);size: 51x38mm; weight: 43g (B3).

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Incubation

About 27 days (B1, B3, B8).

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Hatching

Synchronous.

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Fledging

50-60 days (B8).

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Sexual Maturity

Males --
Females --

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Behaviour

Feeding Behaviour

Adults Probably feeds by diving (B1, B25).
Newly-hatched --

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Parental Behaviour

Nest-building Solitary or in loose groups (B1).
Incubation By female, male leaving during incubation (B8, B25).
Newly-hatched --
Juveniles

--

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Social Behaviour

Intra-specific Found in pairs or small groups, with males gathering for moult (B3, B25).
Inter-specific --

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Sexual Behaviour

Pair formation late winter and spring (B3, B25).

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Predation in Wild

--

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Activity Patterns

--
Circadian --

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Natural Diet

Adults

Plants and animal material; frogs reported as part of diet (B1, B3, B26).

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Newly-hatched

--

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Range and Habitat

Distribution and Movement (Migration etc.)

Normal

Eastern Eurasia: south-eastern Siberia, north-eastern China, possibly North Korea.

Winters south to coastal plains south-eastern China and westward (scattered) to north-east India, Burma, southward to Indochina, small numbers to South Korea, Japan (B1, B19).

Occasional and Accidental

--

Introduced

--

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Habitat

Marshes, swamps, pools and lakes with emergent vegetation in open country. Migrants may use fast-flowing rivers. Winters on larger lakes, marshes, coastal lagoons, estuaries (B1, B3, B8, B19).

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Conservation

Intraspecific variation

--

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Conservation Status

Wild Population -
(Importance)

Vulnerable. Considerable decline over the past decades (B1, B8, B44.9.w1).

CITES listing --
Red-data book listing Vulnerable (B1, W2).
Threats Habitat destruction, pollution, disturbance and hunting (B1, B8, B44.9.w1)

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Captive Populations

Fairly scarce in collections (B8).

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Trade

--

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