Arctic Tern vs Sandwich Tern
Sterna paradisaea ile kıyaslandığında Thalasseus sandvicensis
Side-by-Side Comparison
| Özellik | Arctic Tern | Sandwich Tern |
|---|---|---|
| Bilimsel Ad | Sterna paradisaea | Thalasseus sandvicensis |
| Takım | Charadriiformes | Charadriiformes |
| Familya | Laridae | Laridae |
| Koruma Durumu | Least Concern | Least Concern |
| Uzunluk | 34,0 cm (13.4 in) | — |
| Kanat Açıklığı | 80,0 cm (31.5 in) | 57,7 cm (22.7 in) |
| Ağırlık | 110,0 g (3.88 oz) | 223,5 g (7.88 oz) |
| Beslenme | Small fish and crustaceans caught by plunge-diving from the air. Hovers briefly before diving. | -- |
| Kuluçka Büyüklüğü | 2-3 | 1-2 |
| 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.
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.
Sandwich Tern
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.
Sandwich Tern
Koruma Durumu
Arctic Tern
Sandwich Tern
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
Sandwich Tern
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.
Sandwich Tern
Sandwich Tern, 36–41 cm, is a widespread coastal tern breeding from Western Europe and the Caspian Sea to the Caribbean. Black cap with shaggy crest, slender black bill with a yellow tip. Plunge-dives forcefully for sand eels and sprats. Strongly migratory; European birds winter to West Africa.