American Robin vs Snowy Owl
Turdus migratorius 比較対象 Bubo scandiacus
Side-by-Side Comparison
| 属性 | American Robin | Snowy Owl |
|---|---|---|
| 学名 | Turdus migratorius | Bubo scandiacus |
| 目 | Passeriformes | Strigiformes |
| 科 | Turdidae | Strigidae |
| 保全状況 | Least Concern | Vulnerable |
| 体長 | 25.0 cm (9.8 in) | 63.0 cm (24.8 in) |
| 翼開長 | 36.0 cm (14.2 in) | 145.0 cm (57.1 in) |
| 体重 | 77.0 g (2.72 oz) | 2100.0 g (74.08 oz) |
| 食性 | Earthworms, insects, and fruit. Famously hunts earthworms on lawns by running, stopping, and tilting its … | Primarily lemmings on the breeding grounds, where a pair may consume over 1,500 per year. … |
| 一腹卵数 | 2-4 | 3-14 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
American Robin
Lawns, parks, gardens, farmland, and forest edges. One of the most familiar birds in suburban North America.
Snowy Owl
Arctic tundra for breeding. Winters in open habitats resembling tundra, including prairies, airports, shorelines, and agricultural fields.
Song & Call Comparison
American Robin
A clear, caroling song of 2-3 note phrases: 'cheerily, cheer-up, cheerio'. Sings from dawn perches. Sharp 'tut-tut-tut' alarm call and thin 'seeee' flight note.
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
American Robin
North America from Alaska and Canada to Mexico. Northern populations migrate south in winter; southern populations are largely resident.
Snowy Owl
Circumpolar Arctic for breeding. Irruptive winter movements bring birds south to the northern United States, Europe, and Asia.
保全状況
American Robin
Snowy Owl
How to Tell Them Apart
American Robin
Dark grey-brown upperparts with a warm brick-red breast and belly. White eye-ring and streaked white throat. Female slightly paler.
Bright yellow bill with a dark tip
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
American Robin
北米全域に分布し、春の訪れを告げる鳥として知られるツグミ（体長23〜28cm）。オレンジ色の腹と黒い頭部が特徴的。Turdus migratorius（アメリカコマツグミ）は北米最も親しまれた野鳥の一つで、芝生でミミズを引き抜く姿が日常風景として親しまれている。連邦政府と各州で厳重に保護されており、3州の州鳥に指定されている。Turdidae科。
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.