Common Kestrel vs Snowy Owl
Falco tinnunculus so với Bubo scandiacus
Side-by-Side Comparison
| Thuộc Tính | Common Kestrel | Snowy Owl |
|---|---|---|
| Tên Khoa Học | Falco tinnunculus | Bubo scandiacus |
| Bộ | Falconiformes | Strigiformes |
| Họ | Falconidae | Strigidae |
| Tình Trạng Bảo Tồn | Least Concern | Vulnerable |
| Chiều Dài | 34,0 cm (13.4 in) | 63,0 cm (24.8 in) |
| Chiều Dài Sải Cánh | 74,0 cm (29.1 in) | 145,0 cm (57.1 in) |
| Khối Lượng | 190,0 g (6.70 oz) | 2100,0 g (74.08 oz) |
| Chế Độ Ăn | 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. … |
| Số Trứng | 1-7 | 3-14 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Môi Trường Sống Chung
Common Kestrel only
Không
Snowy Owl only
Không
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.
Tình Trạng Bảo Tồn
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
The common kestrel is Europe's most abundant falcon, famous for its ability to hover motionless in the wind while scanning for prey. Research has shown kestrels can see ultraviolet light, allowing them to detect vole urine trails that reflect UV. The species has adapted remarkably well to urban environments.
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.