American Crow vs Arctic Tern
Corvus brachyrhynchos 비교 대상 Sterna paradisaea
Side-by-Side Comparison
| 속성 | American Crow | Arctic Tern |
|---|---|---|
| 학명 | Corvus brachyrhynchos | Sterna paradisaea |
| 목 | Passeriformes | Charadriiformes |
| 과 | Corvidae | Laridae |
| 보전 상태 | Least Concern | Least Concern |
| 체장 | 45.0 cm (17.7 in) | 34.0 cm (13.4 in) |
| 날개 폭 | 99.0 cm (39.0 in) | 80.0 cm (31.5 in) |
| 체중 | 450.0 g (15.87 oz) | 110.0 g (3.88 oz) |
| 식성 | Highly omnivorous — insects, earthworms, seeds, fruit, eggs, nestlings, carrion, and human food waste. Among … | Small fish and crustaceans caught by plunge-diving from the air. Hovers briefly before diving. |
| 산란 수 | 3-7 | 2-3 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
American Crow
Extremely adaptable — found in farmland, open woodland, suburban neighborhoods, parking lots, and urban parks.
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 Crow
Classic 'caw-caw-caw' repeated in series. Family groups use distinct dialects. Also gives rattling, knocking, and a short 'cah' flight call. Highly social and vocal.
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 Crow
North America from southern Canada through the United States to northern Mexico.
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 Crow
Arctic Tern
How to Tell Them Apart
American Crow
All black with a slight glossy sheen. Squared-off tail and smooth throat distinguish it from the common raven.
Straight, sturdy black bill smaller than a raven's
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 Crow
미국까마귀는 북미에서 가장 친숙하고 지능이 높은 새 중 하나이다. 연구에 따르면 도구를 사용하고, 인간 얼굴을 기억하며, 복잡한 사회 구조를 이룬다. 북미 전역의 다양한 서식지에 적응력이 뛰어나게 서식한다.
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.