Canada Goose vs African Pygmy-goose
Branta canadensis 比較対象 Nettapus auritus
Side-by-Side Comparison
| 属性 | Canada Goose | African Pygmy-goose |
|---|---|---|
| 学名 | Branta canadensis | Nettapus auritus |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 84.6 cm (33.3 in) | 29.9 cm (11.8 in) |
| 体重 | 4906.599999999999 g (173.08 oz) | 272.5 g (9.61 oz) |
| 食性 | Grazes aquatic vegetation and grasses in Arctic tundra; migrates south to winter on estuaries eating … | Filter-feeds on invertebrates and seeds; dabbles in shallow ponds; diet more plant-based outside spring breeding … |
| 一腹卵数 | 1-8 | 6-12 |
| Population Trend | — | — |
Habitat Comparison
Canada Goose
Lakes, rivers, ponds, parks, golf courses, agricultural fields, and coastal marshes across North America. Breeds on ground near water. Many populations now resident year-round in temperate urban areas.
African Pygmy-goose
Freshwater lakes, ponds, and rivers with floating water lilies and other aquatic vegetation across sub-Saharan Africa from Senegal to Tanzania. Nests in tree cavities near water. Highly dependent on water lily vegetation.
Song & Call Comparison
Canada Goose
A loud, resonant 'a-honk' or 'hrr-onk'. Flocks produce a constant clamoring honk during migration. Also gives softer cackling contact calls. One of the most recognizable bird sounds.
African Pygmy-goose
Male produces a soft, wheezy whistle; female gives a quiet, duck-like quack. Pairs exchange rapid twittering notes during courtship on lily-covered African pools.
Geographic Range & Migration
Canada Goose
Breeds across Canada and Alaska; winters from the contiguous US to northern Mexico. Introduced populations resident in Europe and New Zealand.
African Pygmy-goose
Breeds across temperate to sub-Arctic Eurasia; winters in Africa, South Asia, and Southeast Asia.
保全状況
Canada Goose
African Pygmy-goose
How to Tell Them Apart
Canada Goose
Black head and long neck with bold white chin strap. Back and wings brown-gray; underparts pale tan to white on belly. White undertail coverts. Tail black. Large and familiar; sexes …
African Pygmy-goose
Tiny. Males have glossy dark green head with orange facial patch and ear spot; chestnut-orange flanks; white underparts; black and green back. Females duller with dark eye-stripe. Small yellow-green bill.
About These Birds
Canada Goose
北米で最もよく知られる大型のガン（体長75〜110cm）。黒い頭・首と白い頬のパッチが特徴的。Branta canadensis（カナダガン）はヨーロッパ、ニュージーランド、オーストラリアにも外来種として定着し、都市の公園や農地で問題になることがある。強い絆を持つつがいで繁殖し、V字形の隊列で渡りをする。Anatidae科。
African Pygmy-goose
アフリカンピグミーグースはアフリカ南部と東部に分布する小型の木巣性カモです。雄の緑と栗色の美しい羽毛と小さなサイズが特徴的です。水草が豊富な湖や沼地に生息し、蓮や水草の種子を主食とします。木の洞に営巣します。