| Kingdoms / Animalia / Craniata / Aves / Anseriformes / Anatidae / Anas / Species |
| < > Anas formosa - Baikal teal (Click photographs/illustrations: full picture & further details) |
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Alternative Names (Synonyms) |
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| Spectacled teal Formosa teal Clucking teal Gluckente (German) Sarcelle élégante (French) Sarcelle formose (French) Cerceta del Baikal (Spanish) Nettion formosa |
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Names for newly-hatched |
Duckling, downy. |
Names for non-breeding males or other colour-phases |
Eclipse |
Species Author |
Debra Bourne |
Major References |
B1, B3, B5, B8, B19, B25, B26. Aviculture references: |
Other References |
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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, B128.w1, D1) Species-specific information:
(B29, B30, B31, B40, B97, B128.w2) Aviornis UK Ringing Scheme recommended average ring size: H 8.0mm (D8). |
Management Techniques |
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External Appearance (Morphology)
Measurement & Weight |
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| Length | 16 inches, 40cm (B3); 39-43cm (B1) | |
| Adult weight | General | 360-520g (B1). |
| Male | 360-520g, average 437g (B3); mean 15.4 ounces (B8). | |
| Female | 402-505g, average 431g (B3); mean 15.2 ounces (B8). | |
| Newly-hatched weight | -- | |
| Growth rate | -- | |
| Adult | Bill | Male | Dark grey (B8, B25, B26). |
| Variations (If present) | -- | ||
| Eyes (Iris) | Male | Brown (B8, B25, B26). | |
| Variations(If present) | -- | ||
| Juvenile | Bill | Dark grey (B25). | |
| Eyes (Iris) | Brown (B25). | ||
| Adult | Male | Grey or yellowish-grey, webs darker (B3, B8, B25, B26). |
| Variations (If present) | -- | |
| Juvenile | Grey or yellowish-grey, webs darker (B3, B25). | |
| Adult | Male | Head and neck colourful,
cream, black and green: crown,
hind-neck, throat black; black line from eye down to throat divides creamy buff face with
metallic green crescent caudal to this from eye down sides of neck; white line dividing
black crown from green crescent, meeting at nape and continuing to throat. Breast pinkish buff spotted with black,blending into grey sides of breasts and flanks grey with white vertical line down side of breast and white line separating flanks from undertail coverts black. Abdomen white. Tail brown with paler edges, uppertail coverts black. Upperparts brownish; scapulars and tertials long, cinnamon/cream/black. Wings brown/dark grey with greater coverts cinnamon tipped, secondaries metallic green/black with white tips (B3, B5, B8, B25, B26). |
| Variations (If present) | Female:- crown
and nape
dark brown, face buff with darker speckles, round white spot at base of bill,
chin and throat white, with white line extending up from throat to eye. Dark
line from eye to nape
with reddish streak above this. Upperparts dark brown, breast and flanks dark brown
with darker feather centres, abdomen and undertail coverts
white, wings similar to male (B3, B5, B8, B25, B26). Eclipse:- Similar to female, but with less obvious facial pattern; may have long cream scapulars (B3, B5, B25). |
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| Juvenile | Similar to female, duller, lacks white patch near bill, underparts brown spotted/streaked (B1, B3, B5, B25) | |
Newly-hatched Characteristics |
| General: Upperparts
dark brown with yellow markings, underparts including face yellow, dark eyestripe (B1, B5, B26). Bill: Dark grey (B5). Feet: Dark grey (B5). |
Reproductive Season |
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| Time of year | Begins May (B1); end of April to June (B5); mid May to mid July (B25); May to July (B3). |
| No. of Clutches | -- |
Nest placement and structure |
| On dry ground near water, concealed in vegetation such as grass, shrubs or willows (B1, B5, B25, B26). |
Egg clutches |
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| No. of Eggs | Average | -- |
| Range | 6-9 (B1, B8) | |
| Egg Description | Pale greenish (B3, B8); size: 48x35mm; weight: 31g (B3). | |
| 24-25 days (B1, B8). |
| Synchronous. |
| 45-55 days (B8). |
Sexual Maturity |
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| Males | Presumed one year old (Anas standard). |
| Females | Presumed one year old (Anas standard). |
Feeding Behaviour |
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| Adults | Dabble at water surface, also head-dip and upend, and feed on land, including in grain fields in winter, and even utilising spilt crops on roads (B1, B5, B8, B25) |
| Newly-hatched | -- |
Parental Behaviour |
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| Nest-building | Solitary or in loose groups, built by female (B1, B8). |
| Incubation | By female; male departs prior to hatching (B8). |
| Newly-hatched | -- |
| Juveniles | -- |
Social Behaviour |
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| Intra-specific | Highly gregarious, form large flocks in winter. Males gather to moult at sites near breeding grounds (B3, B8, B25). |
| Inter-specific | Often mix with other species (B25). |
Sexual Behaviour |
| Pairs form on wintering areas. Males leave mates before eggs hatch (B8). |
Predation in Wild |
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| Rearmost birds in foraging flocks 'leapfrog' to front (B8). | |
| Circadian | Mainly nocturnal foragers (B8). |
| Seeds, leaves and stems of grasses, sedges, aquatic plants, also crops (e.g. rice, soya beans) and eats acorns. Also small aquatic invertebrates such as snails and insects (B1, B3, B5, B8, B26). |
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Distribution and Movement (Migration etc.) |
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| Normal | North, central Siberia, south to Lake Baikal and Sea of Okhotsk. Winters migrates south to India, Burma, eastern China, south Japan, Greater Antilles, Bahamas (B1, B19). |
| Occasional and Accidental | Some further west to north-eastern India (B1). Vagrants may possibly reach e.g. Britain, Spain, Pacific coast of North America, but birds seen in such places are more probably escapees (B1). |
| Introduced | -- |
| Pools, marshes, small lakes and rivers, in wooded areas and in tundra. In winter, shallow fresh water areas, marshes and sheltered coasts (B1, B3, B8, B19, B25, B26) |
Intraspecific variation |
Conservation Status |
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| Wild Population - (Importance) |
Marked decline, particularly dramatic in the 1970's (B1, B8). |
| CITES listing | -- |
| Red-data book listing | Vulnerable |
| Threats | Habitat loss, hunting, collisions with overhead power lines, disturbance by fishermen and poachers (B1, B8). |
Captive Populations |
| Firmly established in collections (B8). |
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