Auckland Teal vs Mallard
Anas aucklandica comparado com Anas platyrhynchos
Side-by-Side Comparison
| Atributo | Auckland Teal | Mallard |
|---|---|---|
| Nome científico | Anas aucklandica | Anas platyrhynchos |
| Ordem | Anseriformes | Anseriformes |
| Família | Anatidae | Anatidae |
| Estado de conservação | Near Threatened | Least Concern |
| Comprimento | — | 58,0 cm (22.8 in) |
| Envergadura | 27,0 cm (10.6 in) | 90,0 cm (35.4 in) |
| Peso | 522,25 g (18.42 oz) | 1100,0 g (38.80 oz) |
| Dieta | Dives for molluscs, crustaceans, and aquatic invertebrates; diet dominated by hard-shelled prey in coastal habitats. | Omnivorous — aquatic plants, seeds, insects, crustaceans, and mollusks. Feeds by dabbling, upending, and grazing … |
| Tamanho da postura | 1-6 | 4-18 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Auckland Teal
Restricted to predator-free islands of the Auckland Islands subantarctic group (Adams, Disappointment, Ewing islands). Inhabits dense tussock grassland, scrub, and freshwater streams.
Mallard
Nearly any wetland habitat including lakes, rivers, ponds, marshes, estuaries, and urban park ponds.
Song & Call Comparison
Auckland Teal
Female gives a short, nasal quack; male produces a barely audible high note. Nearly flightless; extremely quiet and seldom vocal; calls are reduced even compared with other flightless island teals.
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
Auckland Teal
Breeds in Arctic and sub-Arctic North America; winters on Pacific and Atlantic coasts south to California and the Carolinas.
Mallard
Native across the Northern Hemisphere in North America, Europe, and Asia. Introduced to Australia and New Zealand.
Estado de conservação
Auckland Teal
Mallard
How to Tell Them Apart
Auckland Teal
Dark chocolate-brown plumage; males have iridescent dark green head and white eye-ring. Females dark brown with white eye-ring. Near-flightless. Iridescent speculum. Flightless wings. Auckland Islands endemic.
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
Auckland Teal
Um pato pequeno e incapaz de voar da família Anatidae, endêmico das Ilhas Auckland da Nova Zelândia. O Pato-das-auckland (Anas aucklandica) habita florestas densas e vegetação costeira nas Ilhas Auckland. Mede aproximadamente 46-54 cm. É um dos poucos patos flightless do mundo, adaptado à vida em ilhas oceânicas isoladas. Alimenta-se de invertebrados, sementes e algas marinhas. A população total é estimada em apenas algumas centenas de indivíduos. Classificado como Em Perigo pela UICN, protegido em ilhas livres de predadores.
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.