Auckland Teal vs Mallard
Anas aucklandica в сравнении с Anas platyrhynchos
Side-by-Side Comparison
| Характеристика | Auckland Teal | Mallard |
|---|---|---|
| Научное название | Anas aucklandica | Anas platyrhynchos |
| Отряд | Anseriformes | Anseriformes |
| Семейство | Anatidae | Anatidae |
| Охранный статус | Near Threatened | Least Concern |
| Длина | — | 58,0 cm (22.8 in) |
| Размах крыльев | 27,0 cm (10.6 in) | 90,0 cm (35.4 in) |
| Масса | 522,25 g (18.42 oz) | 1100,0 g (38.80 oz) |
| Питание | 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 … |
| Размер кладки | 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.
Охранный статус
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
A tiny flightless teal with dark brown plumage and a green speculum. Endemic to the Auckland Islands subantarctic group. Wings are reduced, making it completely flightless. Survives only on predator-free islands. Feeds mainly on invertebrates along freshwater streams.
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.