Arctic Tern vs Black-billed Gull
Sterna paradisaea comparado com Larus bulleri
Side-by-Side Comparison
| Atributo | Arctic Tern | Black-billed Gull |
|---|---|---|
| Nome científico | Sterna paradisaea | Larus bulleri |
| Ordem | Charadriiformes | Charadriiformes |
| Família | Laridae | Laridae |
| Estado de conservação | Least Concern | Near Threatened |
| Comprimento | 34,0 cm (13.4 in) | — |
| Envergadura | 80,0 cm (31.5 in) | 57,5 cm (22.6 in) |
| Peso | 110,0 g (3.88 oz) | 216,83333333333334 g (7.65 oz) |
| Dieta | Small fish and crustaceans caught by plunge-diving from the air. Hovers briefly before diving. | -- |
| Tamanho da postura | 2-3 | 1-3 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Habitats partilhados
Arctic Tern only
Black-billed Gull only
Nenhum
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-billed Gull
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-billed Gull
Estado de conservação
Arctic Tern
Black-billed Gull
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-billed Gull
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-billed Gull
Black-billed Gull, 35–38 cm, is endemic to New Zealand, breeding on South Island braided riverbeds. All-white plumage with a slender black bill and black-tipped wings. Endangered; river modification and mammal predation depress breeding success. Insectivore and piscivore in river and coastal habitats.