Taiga Bean Goose vs Black-headed Duck
Anser fabalis 比較対象 Heteronetta atricapilla
Side-by-Side Comparison
| 属性 | Taiga Bean Goose | Black-headed Duck |
|---|---|---|
| 学名 | Anser fabalis | Heteronetta atricapilla |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 89.7 cm (35.3 in) | 34.7 cm (13.7 in) |
| 体重 | 3115.0 g (109.88 oz) | 528.5 g (18.64 oz) |
| 食性 | Eats seeds, aquatic plants, and invertebrates; forages in shallow water and on land; diet varies … | Parasitic; adults may feed on aquatic plants, seeds, and invertebrates in South American marshes. Diet … |
| 一腹卵数 | 3-8 | 2 |
| Population Trend | — | — |
Habitat Comparison
Taiga Bean Goose
Breeds in taiga forest, boggy clearings, and river valleys across Scandinavia and northern Russia. Winters on agricultural fields, pastures, and river valleys in western and central Europe, particularly Belgium and the Netherlands.
Song & Call Comparison
Taiga Bean Goose
A low, nasal 'ung-unk' or 'ow' call — less nasal than Grey-lag. Flocks give continuous calling. The call distinction from Tundra Bean Goose is subtle but detectable.
Black-headed Duck
Male gives a soft, raspy peeping note; female produces a muted quack. An obligate brood parasite with reduced vocalizations; subdued calls suit its secretive lifestyle among Argentine reeds.
Geographic Range & Migration
Taiga Bean Goose
Breeds across Alaska and Canada; winters in the US interior and along coastlines south to the Gulf of Mexico.
Black-headed Duck
Resident in southern South America from southern Brazil and Bolivia south to Argentina and Chile. Found on lakes and marshes in open lowlands.
保全状況
Taiga Bean Goose
Black-headed Duck
How to Tell Them Apart
Taiga Bean Goose
Dark brown head and neck; back dark brown with pale feather edges giving scalloped appearance. Underparts pale gray-brown. Bill orange-yellow with black base and tip. Orange legs. Darker than Pink-footed …
Black-headed Duck
Male has distinctive jet-black head and neck, warm chestnut-brown back, and pale buff underparts; blue-grey bill with red base. Female is streaked brown above with pale supercilium and whitish underparts.
About These Birds
Taiga Bean Goose
ビーンガンはユーラシア北部に繁殖し、温帯地方で越冬するガンです。オレンジ色の嘴と脚が特徴的です。日本では冬鳥として北日本に飛来します。農地、草地、湿地に生息し、農作物の根や葉、草などを採食します。
Black-headed Duck
クロアタマカモはアルゼンチン・チリ・ウルグアイ・ブラジル南部の南アメリカ温帯湖沼・湿地に生息する托卵性のカモ（体長32〜35 cm）。雄は黒い頭と薄い茶色の体が特徴。他のカモ・コオット・ヒクイナの巣に托卵する。育雛しない数少ない水禽の一つ。