Black-capped Screech-owl vs Snowy Owl
Megascops atricapilla 比較対象 Bubo scandiacus
Side-by-Side Comparison
| 属性 | Black-capped Screech-owl | Snowy Owl |
|---|---|---|
| 学名 | Megascops atricapilla | Bubo scandiacus |
| 目 | Strigiformes | Strigiformes |
| 科 | Strigidae | Strigidae |
| 保全状況 | Least Concern | Vulnerable |
| 体長 | — | 63.0 cm (24.8 in) |
| 翼開長 | 34.2 cm (13.5 in) | 145.0 cm (57.1 in) |
| 体重 | 133.0 g (4.69 oz) | 2100.0 g (74.08 oz) |
| 食性 | -- | Primarily lemmings on the breeding grounds, where a pair may consume over 1,500 per year. … |
| 一腹卵数 | 2-3 | 3-14 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Snowy Owl
Arctic tundra for breeding. Winters in open habitats resembling tundra, including prairies, airports, shorelines, and agricultural fields.
Song & Call Comparison
Black-capped Screech-owl
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
Black-capped Screech-owl
Snowy Owl
Circumpolar Arctic for breeding. Irruptive winter movements bring birds south to the northern United States, Europe, and Asia.
保全状況
Black-capped Screech-owl
Snowy Owl
How to Tell Them Apart
Black-capped Screech-owl
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
Black-capped Screech-owl
ブラジル南部からアルゼンチン北部の大西洋岸森林に生息するブラックキャップトスクリーチオウル。体長21〜23cm。褐色で黒い頭頂部が特徴的。夜行性で昆虫や小動物を捕食する。低危険種。
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.