Blue Jay vs Common Kingfisher
Cyanocitta cristata 比較対象 Alcedo atthis
Side-by-Side Comparison
| 属性 | Blue Jay | Common Kingfisher |
|---|---|---|
| 学名 | Cyanocitta cristata | Alcedo atthis |
| 目 | Passeriformes | Coraciiformes |
| 科 | Corvidae | Alcedinidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | 28.0 cm (11.0 in) | 17.0 cm (6.7 in) |
| 翼開長 | 42.0 cm (16.5 in) | 25.0 cm (9.8 in) |
| 体重 | 87.0 g (3.07 oz) | 36.0 g (1.27 oz) |
| 食性 | Omnivorous — nuts (especially acorns), seeds, berries, insects, and occasionally eggs or nestlings of other … | Small fish, aquatic insects, and crustaceans. Hunts from a low perch over water, diving headfirst … |
| 一腹卵数 | 2-7 | 3-10 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Blue Jay
Deciduous and mixed forests, parks, and suburban areas. Highly adaptable to human-modified landscapes.
Common Kingfisher
Clear, slow-flowing rivers, streams, lakes, and ponds with suitable perching and nesting banks. Requires clean water with good fish populations.
Song & Call Comparison
Blue Jay
A harsh, ringing 'jaay-jaay-jaay'. Also mimics Red-tailed Hawk and other species convincingly. Gives soft, liquid 'bell' calls and gurgling whispers in flocks.
Common Kingfisher
A sharp, penetrating 'chee' whistle given in flight, often the first indication of its presence. Short, shrill single note as it darts low over rivers. Contact call is a rippling …
Geographic Range & Migration
Blue Jay
Eastern and central North America from southern Canada to the Gulf Coast. Some populations migrate irregularly.
Common Kingfisher
Widespread across Europe, Asia, and North Africa. Northern populations migrate south in winter.
保全状況
Blue Jay
Common Kingfisher
How to Tell Them Apart
Blue Jay
Bright blue upperparts with black barring on the wings and tail. White face and underparts with a black necklace. Prominent blue crest.
Stout, straight black bill
Common Kingfisher
Brilliant electric blue upperparts and orange underparts. Blue-green crown with darker barring. White throat patch and cheek spots. A flash of blue in flight.
Long, straight, dagger-like dark bill — orange base on the lower mandible in females
About These Birds
Blue Jay
アオカケスは鮮やかな羽毛と大きな鳴き声で知られるカラス科の大胆で知能が高い鳥。アオカケスは毎秋数千個のドングリを蓄えることでカシの木の重要な散布者となっている。複雑な社会的行動には、給餌器から他の鳥を追い払うためにタカの声を真似ることも含まれる。
Common Kingfisher
カワセミ（Alcedo atthis）— ユーラシアおよびアフリカに広く分布する鮮やかな青橙色の鳥。川や池のほとりで魚を捕食する。