Common Kestrel vs Snowy Owl
Falco tinnunculus 比較対象 Bubo scandiacus
Side-by-Side Comparison
| 属性 | Common Kestrel | Snowy Owl |
|---|---|---|
| 学名 | Falco tinnunculus | Bubo scandiacus |
| 目 | Falconiformes | Strigiformes |
| 科 | Falconidae | Strigidae |
| 保全状況 | Least Concern | Vulnerable |
| 体長 | 34.0 cm (13.4 in) | 63.0 cm (24.8 in) |
| 翼開長 | 74.0 cm (29.1 in) | 145.0 cm (57.1 in) |
| 体重 | 190.0 g (6.70 oz) | 2100.0 g (74.08 oz) |
| 食性 | Primarily voles and mice, also lizards, large insects, and small birds. Hunts by hovering at … | Primarily lemmings on the breeding grounds, where a pair may consume over 1,500 per year. … |
| 一腹卵数 | 1-7 | 3-14 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Common Kestrel
Open country including farmland, grasslands, moorland, and urban areas. Common along motorways and in cities across Europe.
Snowy Owl
Arctic tundra for breeding. Winters in open habitats resembling tundra, including prairies, airports, shorelines, and agricultural fields.
Song & Call Comparison
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.
Snowy Owl
Male gives a deep booming hoot 'hooooo' and a rising 'hoo-hoo' series. Also barks sharply when alarmed. Quieter than many owls; silent during long Arctic winter hunts.
Geographic Range & Migration
Common Kestrel
Europe, Asia, and Africa. One of the most common and widespread raptors in the Old World.
Snowy Owl
Circumpolar Arctic for breeding. Irruptive winter movements bring birds south to the northern United States, Europe, and Asia.
保全状況
Common Kestrel
Snowy Owl
How to Tell Them Apart
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
Snowy Owl
Adult males are almost entirely white. Females and immatures have dark brown barring and spotting. Yellow eyes and fully feathered feet.
Dark hooked bill mostly hidden by dense facial feathering
About These Birds
Common Kestrel
チョウゲンボウ（Falco tinnunculus）— ヨーロッパからアジア、アフリカに広く分布する小型のハヤブサ。ホバリングしながら地上の獲物を探す行動が特徴。
Snowy Owl
The snowy owl is the heaviest North American owl and one of the most charismatic Arctic birds. Unlike most owls, it is largely diurnal, necessitated by the continuous daylight of Arctic summers. Snowy owl irruptions — periodic mass southward movements — are tied to lemming population cycles.