Tundra Bean Goose vs Mallard
Anser serrirostris 比較対象 Anas platyrhynchos
Side-by-Side Comparison
| 属性 | Tundra Bean Goose | Mallard |
|---|---|---|
| 学名 | Anser serrirostris | Anas platyrhynchos |
| 目 | Anseriformes | Anseriformes |
| 科 | Anatidae | Anatidae |
| 保全状況 | Not Evaluated | Least Concern |
| 体長 | — | 58.0 cm (22.8 in) |
| 翼開長 | — | 90.0 cm (35.4 in) |
| 体重 | 2540.0 g (89.60 oz) | 1100.0 g (38.80 oz) |
| 食性 | -- | Omnivorous — aquatic plants, seeds, insects, crustaceans, and mollusks. Feeds by dabbling, upending, and grazing … |
| 一腹卵数 | 3-8 | 4-18 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Tundra Bean Goose
Breeds on Arctic and subarctic tundra in Siberia. Winters on agricultural land, river floodplains, and wetlands in eastern China, Japan, and Korea, with some wintering in western Europe.
Mallard
Nearly any wetland habitat including lakes, rivers, ponds, marshes, estuaries, and urban park ponds.
Song & Call Comparison
Tundra Bean Goose
A nasal, lower call compared to Taiga Bean Goose. Considered subspecifically or specifically distinct; vocalizations are an active taxonomic tool for separation in mixed flocks.
Mallard
Female gives the classic 'quack-quack-quack', descending in pitch. Male utters soft nasal 'raeb-raeb'. Both give a high 'gag-gag-gag' when alarmed or taking flight.
Geographic Range & Migration
Tundra Bean Goose
Mallard
Native across the Northern Hemisphere in North America, Europe, and Asia. Introduced to Australia and New Zealand.
保全状況
Tundra Bean Goose
Mallard
How to Tell Them Apart
Tundra Bean Goose
Dark brown head and neck; grayish-brown back with pale feather fringing. Underparts pale gray-brown. Orange-yellow legs. Bill black with orange subterminal band. Recently split from Taiga Bean Goose.
Mallard
Breeding males have an iridescent green head, white neck ring, chestnut breast, and grey body. Females are mottled brown. Both sexes show a blue speculum bordered by white.
Broad, flat bill — yellow-green in males, orange-brown in females
About These Birds
Tundra Bean Goose
テンドリガンはロシア北東部に繁殖し、東アジアで越冬するガンです。ビーンガンに近縁ですが、嘴の模様が異なります。日本では冬鳥として希に飛来します。農地や湿地で草や農作物の葉を採食します。
Mallard
世界で最も一般的なカモ。雄は光沢のある緑色の頭、白い首輪、栗色の胸が特徴。体長50〜65cm。ほぼ世界中の湖、川、池、湿地に生息。雑食性で植物や無脊椎動物を食べる。多くの家禽カモの祖先。低危険種。