Arctic Tern vs Águia-rabalva
Sterna paradisaea comparado com Haliaeetus albicilla
Side-by-Side Comparison
| Atributo | Arctic Tern | Águia-rabalva |
|---|---|---|
| Nome científico | Sterna paradisaea | Haliaeetus albicilla |
| Ordem | Charadriiformes | Accipitriformes |
| Família | Laridae | Accipitridae |
| Estado de conservação | Least Concern | Least Concern |
| Comprimento | 34,0 cm (13.4 in) | 84,0 cm (33.1 in) |
| Envergadura | 80,0 cm (31.5 in) | 225,0 cm (88.6 in) |
| Peso | 110,0 g (3.88 oz) | 5200,0 g (183.42 oz) |
| Dieta | Small fish and crustaceans caught by plunge-diving from the air. Hovers briefly before diving. | Fish, waterfowl, and carrion. Often pirates food from other birds. Takes fish from the water … |
| Tamanho da postura | 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.
Águia-rabalva
Coastlines, large lakes, and rivers with mature trees or cliffs for nesting. Requires large undisturbed areas.
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.
Águia-rabalva
High-pitched, yelping 'klee-klee' and deep barking 'ra-ra-ra'. Less vocal than Bald Eagle but similar chattering quality. Gives gull-like wailing near nest in breeding season.
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.
Águia-rabalva
Northern Europe and Asia from Greenland and Scandinavia to Japan. Reintroduced to Scotland and Ireland.
Estado de conservação
Arctic Tern
Águia-rabalva
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
Águia-rabalva
Brown body with a paler head in adults and a distinctive short white wedge-shaped tail. Massive broad wings in flight. Juveniles are darker overall.
Very large, heavy, pale yellow bill
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.
Águia-rabalva
The white-tailed eagle is Europe's largest eagle and the fourth-largest eagle in the world. Once extinct in Britain, it has been successfully reintroduced to Scotland and Ireland through conservation programs. These powerful raptors can live over 25 years and form lifelong pair bonds.