Blue Jay vs Common Kestrel
Cyanocitta cristata 对比 Falco tinnunculus
Side-by-Side Comparison
| 属性 | Blue Jay | Common Kestrel |
|---|---|---|
| 学名 | Cyanocitta cristata | Falco tinnunculus |
| 目 | Passeriformes | Falconiformes |
| 科 | Corvidae | Falconidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | 28.0 cm (11.0 in) | 34.0 cm (13.4 in) |
| 翼展 | 42.0 cm (16.5 in) | 74.0 cm (29.1 in) |
| 体重 | 87.0 g (3.07 oz) | 190.0 g (6.70 oz) |
| 食性 | Omnivorous — nuts (especially acorns), seeds, berries, insects, and occasionally eggs or nestlings of other … | Primarily voles and mice, also lizards, large insects, and small birds. Hunts by hovering at … |
| 产卵数 | 2-7 | 1-7 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Blue Jay
Deciduous and mixed forests, parks, and suburban areas. Highly adaptable to human-modified landscapes.
Common Kestrel
Open country including farmland, grasslands, moorland, and urban areas. Common along motorways and in cities across Europe.
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 Kestrel
A shrill, repeated 'kee-kee-kee-kee' or 'kik-ik-ik', especially near nest. Alarm call is a nasal chattering. Generally less vocal than larger falcons. Calls ring clearly in open country.
Geographic Range & Migration
Blue Jay
Eastern and central North America from southern Canada to the Gulf Coast. Some populations migrate irregularly.
Common Kestrel
Europe, Asia, and Africa. One of the most common and widespread raptors in the Old World.
保护状况
Blue Jay
Common Kestrel
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 Kestrel
Males have a blue-grey head and tail with a rufous back spotted with black. Females are rufous-brown with heavy barring. Both have a dark moustachial stripe.
Short, hooked grey bill with a yellow cere
About These Birds
Blue Jay
The blue jay is a bold, intelligent member of the corvid family known for its striking plumage and loud calls. Blue jays are important dispersers of oak trees, as they cache thousands of acorns each autumn. Their complex social behavior includes mimicking the calls of hawks to scare other birds from feeders.
Common Kestrel
红隼（Falco tinnunculus）— 广泛分布于欧洲、亚洲和非洲的小型隼。以悬停空中寻觅地面猎物的行为为特征。