Arctic Tern vs Snowy Owl
Sterna paradisaea 비교 대상 Bubo scandiacus
Side-by-Side Comparison
| 속성 | Arctic Tern | Snowy Owl |
|---|---|---|
| 학명 | Sterna paradisaea | Bubo scandiacus |
| 목 | Charadriiformes | Strigiformes |
| 과 | Laridae | Strigidae |
| 보전 상태 | Least Concern | Vulnerable |
| 체장 | 34.0 cm (13.4 in) | 63.0 cm (24.8 in) |
| 날개 폭 | 80.0 cm (31.5 in) | 145.0 cm (57.1 in) |
| 체중 | 110.0 g (3.88 oz) | 2100.0 g (74.08 oz) |
| 식성 | Small fish and crustaceans caught by plunge-diving from the air. Hovers briefly before diving. | Primarily lemmings on the breeding grounds, where a pair may consume over 1,500 per year. … |
| 산란 수 | 2-3 | 3-14 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
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.
Snowy Owl
Arctic tundra for breeding. Winters in open habitats resembling tundra, including prairies, airports, shorelines, and agricultural fields.
Song & Call Comparison
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.
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
Arctic Tern
Breeds in the Arctic and sub-Arctic. Migrates to the Antarctic, experiencing two summers per year. Found on every ocean.
Snowy Owl
Circumpolar Arctic for breeding. Irruptive winter movements bring birds south to the northern United States, Europe, and Asia.
보전 상태
Arctic Tern
Snowy Owl
How to Tell Them Apart
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
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
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.
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.