Hawaiian Duck vs Black Swan
Anas wyvilliana comparado com Cygnus atratus
Side-by-Side Comparison
| Atributo | Hawaiian Duck | Black Swan |
|---|---|---|
| Nome científico | Anas wyvilliana | Cygnus atratus |
| Ordem | Anseriformes | Anseriformes |
| Família | Anatidae | Anatidae |
| Estado de conservação | Vulnerable | Least Concern |
| Comprimento | — | 130,0 cm (51.2 in) |
| Envergadura | 44,0 cm (17.3 in) | 190,0 cm (74.8 in) |
| Peso | 573,25 g (20.22 oz) | 6200,0 g (218.70 oz) |
| Dieta | Fish-diving duck of South American rivers; uses serrated bill to catch fish and aquatic invertebrates; … | Aquatic vegetation and algae, supplemented with grain and pasture grasses. Feeds by upending in shallow … |
| Tamanho da postura | 9-13 | 4-6 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Hawaiian Duck
Freshwater marshes, rivers, reservoirs, and taro fields on Kauai and other Hawaiian islands. Nests in dense vegetation near water. Threatened by hybridization with domestic or feral Mallards.
Black Swan
Lakes, rivers, swamps, and coastal waters across Australia. Also found in ornamental lakes in parks.
Song & Call Comparison
Hawaiian Duck
Female produces a raspy, descending quacking series; male gives a soft, nasal sound. Calls similar to Mallard but higher-pitched; alarm is a rapid-fire quacking rattle.
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
Hawaiian Duck
Ranges across sub-Saharan Africa in open grasslands and wetland edges. Locally nomadic following seasonal rainfall patterns.
Black Swan
Australia, primarily in the southeast and southwest. Introduced populations in New Zealand, Japan, and western Europe.
Estado de conservação
Hawaiian Duck
Black Swan
How to Tell Them Apart
Hawaiian Duck
Mottled brown plumage; males may show slight green gloss on head but reduced compared to Mallard. Iridescent blue-purple speculum with white borders. Orange bill. Females similar to males; pale buff …
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
Hawaiian Duck
O pato havaiano, ou koloa maoli, é um pato dabbling ameaçado endémico do Havai. Assemelha-se a um pato-real de tamanho reduzido e é encontrado em zonas húmidas, rios e áreas costeiras nas principais ilhas havaianas. Enfrenta ameaças de hibridização com patos-reais introduzidos, perda de habitat e predação por espécies invasoras. Os esforços de conservação incluem programas de criação em cativeiro e gestão de habitat para manter as populações puras geneticamente.
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.