Egyptian Goose vs Black-headed Duck
Alopochen aegyptiaca 比較対象 Heteronetta atricapilla
Side-by-Side Comparison
| 属性 | Egyptian Goose | Black-headed Duck |
|---|---|---|
| 学名 | Alopochen aegyptiaca | Heteronetta atricapilla |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 71.2 cm (28.0 in) | 34.7 cm (13.7 in) |
| 体重 | 2021.3333333333333 g (71.30 oz) | 528.5 g (18.64 oz) |
| 食性 | Feeds on seeds, grasses, and invertebrates; forages on land and water; diet shifts between terrestrial … | Parasitic; adults may feed on aquatic plants, seeds, and invertebrates in South American marshes. Diet … |
| 一腹卵数 | 5-14 | 2 |
| Population Trend | — | — |
Habitat Comparison
Egyptian Goose
Native to sub-Saharan Africa and the Nile Valley; also introduced in western Europe. Freshwater margins, agricultural fields, parks, and golf courses. Highly adaptable; common near human habitation.
Song & Call Comparison
Egyptian Goose
A harsh, honking 'haw-haw' from males; females give a reedy, nasal 'kink-kink'. Very vocal and aggressive; pairs call repeatedly near nest sites in African wetlands.
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
Egyptian Goose
Formerly bred in eastern North America; range collapsed in the 19th century. Extinct by 1914; last wild individual shot in 1900.
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
Egyptian Goose
Black-headed Duck
How to Tell Them Apart
Egyptian Goose
Pale grayish-brown with chestnut-brown patch around eye and dark chestnut patch on breast center. Wings show large white patch and black-and-green speculum in flight. Pinkish bill and legs. Sexes similar.
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
Egyptian Goose
エジプトガンはアフリカ大陸とナイル川流域原産のガン科鳥類です。茶色と灰色の羽毛に目の周りの赤褐色の斑点が特徴的です。川、湖、湿地、農地に生息し、草、種子、農作物を採食します。ヨーロッパでも帰化個体群が確立しています。
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。