Campbell Teal vs Black Swan
Anas nesiotis comparado com Cygnus atratus
Side-by-Side Comparison
| Atributo | Campbell Teal | Black Swan |
|---|---|---|
| Nome científico | Anas nesiotis | Cygnus atratus |
| Ordem | Anseriformes | Anseriformes |
| Família | Anatidae | Anatidae |
| Estado de conservação | Vulnerable | Least Concern |
| Comprimento | — | 130,0 cm (51.2 in) |
| Envergadura | 24,4 cm (9.6 in) | 190,0 cm (74.8 in) |
| Peso | 358,75 g (12.65 oz) | 6200,0 g (218.70 oz) |
| Dieta | Eats molluscs, crustaceans, and aquatic invertebrates in coastal and freshwater habitats; diet varies with season. | Aquatic vegetation and algae, supplemented with grain and pasture grasses. Feeds by upending in shallow … |
| Tamanho da postura | 5-6 | 4-6 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Campbell Teal
Restricted to Campbell Island and Dent Island in the subantarctic New Zealand group. Dense tussock grassland, rocky shores, and freshwater streams. Nocturnal or crepuscular. Highly sedentary.
Black Swan
Lakes, rivers, swamps, and coastal waters across Australia. Also found in ornamental lakes in parks.
Song & Call Comparison
Campbell Teal
Female produces a very soft quacking note; male gives a faint squeak. Near-silent; rarely vocalizes; the reduced call apparatus mirrors the species' severely limited wingspan and near-flightlessness.
Black Swan
Gives a musical bugling 'boo-boo-boo' in flight and softer honking on water. Less vocal than Mute Swan; produces a baying call when alarmed. Wings whistle softly in flight.
Geographic Range & Migration
Campbell Teal
Breeds in sub-Arctic freshwater lakes of Canada; winters along the Pacific coast from Alaska to Baja California.
Black Swan
Australia, primarily in the southeast and southwest. Introduced populations in New Zealand, Japan, and western Europe.
Estado de conservação
Campbell Teal
Black Swan
How to Tell Them Apart
Campbell Teal
Very dark brown plumage; males have iridescent green head gloss and white eye-ring. Females dark brown with white eye-ring. Flightless; tiny vestigial wings. Recovered from near-extinction on Campbell Island, New …
Black Swan
Almost entirely black with white flight feathers visible in flight. Red bill with a white band near the tip. Dark red to reddish-brown iris.
Bright red bill with a pale tip and prominent white band
About These Birds
Campbell Teal
O pato-de-campbell é um pato dabbling criticamente ameaçado endémico da Ilha Campbell, um território subantártico da Nova Zelândia. Quase foi extinto pelos ratos introduzidos que predam ninhos e filhotes. Após a bem-sucedida erradicação dos ratos da ilha nos anos 2000, as populações recuperaram. É pequeno e compacto com plumagem castanho-mosqueada. Habita rios, riachos e zonas húmidas costeiras na ilha. Representa um dos sucessos de conservação mais notáveis de pássaros insulares.
Black Swan
The black swan was once considered impossible by Europeans who believed all swans were white, making it a famous philosophical example of inductive reasoning failure. It is the state emblem of Western Australia. Black swans form lifelong pair bonds and both parents share in incubation and care of cygnets.