Common Raven vs Mallard
Corvus corax 比較対象 Anas platyrhynchos
Side-by-Side Comparison
| 属性 | Common Raven | Mallard |
|---|---|---|
| 学名 | Corvus corax | Anas platyrhynchos |
| 目 | Passeriformes | Anseriformes |
| 科 | Corvidae | Anatidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | 63.0 cm (24.8 in) | 58.0 cm (22.8 in) |
| 翼開長 | 130.0 cm (51.2 in) | 90.0 cm (35.4 in) |
| 体重 | 1200.0 g (42.33 oz) | 1100.0 g (38.80 oz) |
| 食性 | Omnivorous and opportunistic — carrion, small animals, insects, eggs, grain, fruit, and human refuse. Among … | Omnivorous — aquatic plants, seeds, insects, crustaceans, and mollusks. Feeds by dabbling, upending, and grazing … |
| 一腹卵数 | 1-8 | 4-18 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Common Raven
Diverse habitats from Arctic tundra to deserts, mountains, forests, and coastlines. Avoids dense urban areas but thrives near human activity.
Mallard
Nearly any wetland habitat including lakes, rivers, ponds, marshes, estuaries, and urban park ponds.
Song & Call Comparison
Common Raven
Highly varied: deep resonant 'kraa-kraa-kraa', hollow 'tok-tok', liquid 'klonk', and wing-whooshing. Among the most intelligent corvid callers; uses calls contextually in groups.
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
Common Raven
Holarctic distribution across North America, Europe, Asia, and North Africa. The most widely distributed corvid.
Mallard
Native across the Northern Hemisphere in North America, Europe, and Asia. Introduced to Australia and New Zealand.
保全状況
Common Raven
Mallard
How to Tell Them Apart
Common Raven
All black with a glossy purplish-blue iridescent sheen. Shaggy throat hackles, long wedge-shaped tail, and large robust build distinguish it from crows.
Large, powerful, curved black bill
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
Common Raven
ワタリガラス（Corvus corax）— 北半球に広く分布する最大のスズメ目の鳥。高い知性をもち、道具を使うことや問題解決能力が知られている。
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。