Arctic Tern vs Black-legged Kittiwake
Sterna paradisaea so với Rissa tridactyla
Side-by-Side Comparison
| Thuộc Tính | Arctic Tern | Black-legged Kittiwake |
|---|---|---|
| Tên Khoa Học | Sterna paradisaea | Rissa tridactyla |
| Bộ | Charadriiformes | Charadriiformes |
| Họ | Laridae | Laridae |
| Tình Trạng Bảo Tồn | Least Concern | Vulnerable |
| Chiều Dài | 34,0 cm (13.4 in) | — |
| Chiều Dài Sải Cánh | 80,0 cm (31.5 in) | 60,2 cm (23.7 in) |
| Khối Lượng | 110,0 g (3.88 oz) | 439,3333333333333 g (15.50 oz) |
| Chế Độ Ăn | Small fish and crustaceans caught by plunge-diving from the air. Hovers briefly before diving. | -- |
| Số Trứng | 2-3 | 1-3 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Môi Trường Sống Chung
Arctic Tern only
Black-legged Kittiwake only
Không
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
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.
Black-legged Kittiwake
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.
Black-legged Kittiwake
Tình Trạng Bảo Tồn
Arctic Tern
Black-legged Kittiwake
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
Black-legged Kittiwake
About These Birds
Arctic Tern
The Arctic tern holds the record for the longest known migration of any animal, traveling roughly 70,000 km annually from Arctic to Antarctic and back. Over its 30-year lifespan, it may fly the equivalent of three round trips to the Moon. This remarkable bird experiences more daylight than any other creature on Earth.
Black-legged Kittiwake
Black-legged Kittiwake, 38–40 cm, wingspan 91–105 cm, is the most abundant gull globally, with millions breeding on cliff ledges across the North Atlantic and Pacific. White body, grey mantle, solid black wing tips, yellow bill, black legs. Pelagic piscivore outside breeding. Vulnerable; declining.