American Crow vs Shoebill
Corvus brachyrhynchos 比較対象 Balaeniceps rex
Side-by-Side Comparison
| 属性 | American Crow | Shoebill |
|---|---|---|
| 学名 | Corvus brachyrhynchos | Balaeniceps rex |
| 目 | Passeriformes | Pelecaniformes |
| 科 | Corvidae | Balaenicipitidae |
| 保全状況 | Least Concern | Vulnerable |
| 体長 | 45.0 cm (17.7 in) | 120.0 cm (47.2 in) |
| 翼開長 | 99.0 cm (39.0 in) | 240.0 cm (94.5 in) |
| 体重 | 450.0 g (15.87 oz) | 5500.0 g (194.01 oz) |
| 食性 | Highly omnivorous — insects, earthworms, seeds, fruit, eggs, nestlings, carrion, and human food waste. Among … | Primarily lungfish, also catfish, water snakes, monitor lizards, and baby crocodiles. Hunts by standing motionless, … |
| 一腹卵数 | 3-7 | 1-3 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
American Crow
Extremely adaptable — found in farmland, open woodland, suburban neighborhoods, parking lots, and urban parks.
Shoebill
Freshwater swamps dominated by papyrus and other dense aquatic vegetation in tropical East Africa.
Song & Call Comparison
American Crow
Classic 'caw-caw-caw' repeated in series. Family groups use distinct dialects. Also gives rattling, knocking, and a short 'cah' flight call. Highly social and vocal.
Shoebill
Largely silent; produces mechanical bill-clattering 'clap-clap-clap' when greeting at the nest — similar to White Stork. Also gives low croaking grunts. Rarely calls in the wild.
Geographic Range & Migration
American Crow
North America from southern Canada through the United States to northern Mexico.
Shoebill
Central and East Africa from South Sudan and Ethiopia south to Zambia. Largest populations in South Sudan and Uganda.
保全状況
American Crow
Shoebill
How to Tell Them Apart
American Crow
All black with a slight glossy sheen. Squared-off tail and smooth throat distinguish it from the common raven.
Straight, sturdy black bill smaller than a raven's
Shoebill
Blue-grey plumage overall with a slightly darker back and wings. Powder down gives a washed-out appearance. Small tuft on the back of the head.
Massive shoe-shaped bill, one of the largest of any bird — pale yellowish-grey with darker markings
About These Birds
American Crow
北米全域に広く分布する大型のカラス（体長40〜53cm）。全身光沢のある黒で、知性が高く強い社会性を持つ。Corvus brachyrhynchos（アメリカガラス）は北米で最もよく見られるカラスで、交通量の多い道路に堅い木の実を置いて車に割らせる「道具使用」が観察されている。Corvidae科。
Shoebill
The shoebill is one of the most sought-after birds for birdwatchers visiting Africa, prized for its prehistoric appearance and massive bill. It can stand motionless for hours before collapsing forward to seize prey in its enormous bill. Despite standing over a meter tall, shoebills weigh relatively little due to their hollow bones.