American Robin vs Arctic Tern
Turdus migratorius 비교 대상 Sterna paradisaea
Side-by-Side Comparison
| 속성 | American Robin | Arctic Tern |
|---|---|---|
| 학명 | Turdus migratorius | Sterna paradisaea |
| 목 | Passeriformes | Charadriiformes |
| 과 | Turdidae | Laridae |
| 보전 상태 | Least Concern | Least Concern |
| 체장 | 25.0 cm (9.8 in) | 34.0 cm (13.4 in) |
| 날개 폭 | 36.0 cm (14.2 in) | 80.0 cm (31.5 in) |
| 체중 | 77.0 g (2.72 oz) | 110.0 g (3.88 oz) |
| 식성 | Earthworms, insects, and fruit. Famously hunts earthworms on lawns by running, stopping, and tilting its … | Small fish and crustaceans caught by plunge-diving from the air. Hovers briefly before diving. |
| 산란 수 | 2-4 | 2-3 |
| 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.
Arctic Tern
Breeds on coastal and tundra habitats. Spends most of its life at sea over the open ocean. Nests in colonies on beaches and rocky shores.
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.
Arctic Tern
A sharp, grating 'kree-yah' alarm call. Also gives 'kik-kik-kik' near the nest. Highly aggressive vocally during the Arctic breeding season. Calls are harsh and insistent.
Geographic Range & Migration
American Robin
North America from Alaska and Canada to Mexico. Northern populations migrate south in winter; southern populations are largely resident.
Arctic Tern
Breeds in the Arctic and sub-Arctic. Migrates to the Antarctic, experiencing two summers per year. Found on every ocean.
보전 상태
American Robin
Arctic Tern
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
Arctic Tern
Pale grey upperparts, white underparts with a black cap. Blood-red bill and short red legs. Deeply forked tail streamers. Winter adults lose the full black cap.
Slender, pointed, bright red bill
About These Birds
American Robin
아메리카울새는 북미 전역에서 봄의 전령으로 널리 알려져 있다. 이름과 달리 실제 유럽울새와 관련이 없으며, 지빠귀과(Turdidae)에 속한다. 빨간 가슴과 노래 소리로 쉽게 알아볼 수 있다.
Arctic Tern
북극제비갈매기는 모든 동물 중 가장 긴 이동 기록을 보유하고 있어, 매년 북극에서 남극까지 약 7만 km를 왕복합니다. 약 30년의 수명 동안 달을 세 번 왕복하는 거리를 날아다닙니다. 지구상 어떤 생물보다 많은 일광을 경험하는 놀라운 새입니다.