Hawaiian Duck vs Mallard
Anas wyvilliana comparado com Anas platyrhynchos
Side-by-Side Comparison
| Atributo | Hawaiian Duck | Mallard |
|---|---|---|
| Nome científico | Anas wyvilliana | Anas platyrhynchos |
| Ordem | Anseriformes | Anseriformes |
| Família | Anatidae | Anatidae |
| Estado de conservação | Vulnerable | Least Concern |
| Comprimento | — | 58,0 cm (22.8 in) |
| Envergadura | 44,0 cm (17.3 in) | 90,0 cm (35.4 in) |
| Peso | 573,25 g (20.22 oz) | 1100,0 g (38.80 oz) |
| Dieta | Fish-diving duck of South American rivers; uses serrated bill to catch fish and aquatic invertebrates; … | Omnivorous — aquatic plants, seeds, insects, crustaceans, and mollusks. Feeds by dabbling, upending, and grazing … |
| Tamanho da postura | 9-13 | 4-18 |
| 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.
Mallard
Nearly any wetland habitat including lakes, rivers, ponds, marshes, estuaries, and urban park ponds.
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.
Mallard
Female gives the classic 'quack-quack-quack', descending in pitch. Male utters soft nasal 'raeb-raeb'. Both give a high 'gag-gag-gag' when alarmed or taking flight.
Geographic Range & Migration
Hawaiian Duck
Ranges across sub-Saharan Africa in open grasslands and wetland edges. Locally nomadic following seasonal rainfall patterns.
Mallard
Native across the Northern Hemisphere in North America, Europe, and Asia. Introduced to Australia and New Zealand.
Estado de conservação
Hawaiian Duck
Mallard
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 …
Mallard
Breeding males have an iridescent green head, white neck ring, chestnut breast, and grey body. Females are mottled brown. Both sexes show a blue speculum bordered by white.
Broad, flat bill — yellow-green in males, orange-brown in females
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.
Mallard
The mallard is the ancestor of most domestic duck breeds and the most abundant and widespread dabbling duck in the world. Males perform elaborate courtship displays including head-bobbing and whistle-grunt calls. Mallards are highly adaptable, thriving in both wilderness and urban environments.