Arctic Tern vs South American Tern
Sterna paradisaea से तुलना Sterna hirundinacea
Side-by-Side Comparison
| विशेषता | Arctic Tern | South American Tern |
|---|---|---|
| वैज्ञानिक नाम | Sterna paradisaea | Sterna hirundinacea |
| गण | Charadriiformes | Charadriiformes |
| कुल | Laridae | Laridae |
| संरक्षण स्थिति | Least Concern | Least Concern |
| लंबाई | 34.0 cm (13.4 in) | — |
| पंखों का फैलाव | 80.0 cm (31.5 in) | 59.3 cm (23.3 in) |
| वजन | 110.0 g (3.88 oz) | 190.25 g (6.71 oz) |
| आहार | Small fish and crustaceans caught by plunge-diving from the air. Hovers briefly before diving. | -- |
| अंडों की संख्या | 2-3 | 1-3 |
| 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.
South American 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.
South American Tern
संरक्षण स्थिति
Arctic Tern
South American 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
South American 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.
South American Tern
South American Tern, 40–44 cm, is the largest South American tern, breeding from Peru around Cape Horn to southeastern Brazil. Red bill, grey mantle, black cap. Pelagic and coastal piscivore; strong plunge-diver. Movements poorly known; some populations may migrate north along both coasts.