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Hardhead

Aythya australis

Least Concern

翼開長

42.7 cm

体重

803.75 g

科

Anatidae

目

Anseriformes

On this page

について

オーストラリアンホワイトアイはオーストラリアとニュージーランドに分布する潜水性カモです。雄は栗色の頭部と赤い目が特徴的です。水草が豊富な深い湿地や湖に生息し、水に潜って水草の塊茎や根を採食します。オーストラリアでは比較的普通に見られる種です。

Physical Description

Measurement	Value	Imperial
翼開長	42.7 cm	16.8 in
体重	803.75 g	28.35 oz

識別

羽毛

Males dark chocolate-brown with white undertail and flanks. White eye conspicuous. Blue-gray bill with white band and black tip. Females similar but brown with brown eye. Bold white wing stripe in flight. Australian endemic.

Habitat & Range

Deep freshwater lakes, rivers, and reservoirs across Australia and New Guinea. Nomadic in Australia, following seasonal inland flooding. Prefers deep water with submerged aquatic plants.

🌿 Wetland 🏖️ Coastal

分布域

Breeds in northern prairie potholes; winters along the Pacific coast of North America from British Columbia to Baja California.

Diet & Feeding

Dives for molluscs, crustaceans, and aquatic invertebrates in coastal habitats; diet shifts between invertebrate types seasonally.

保全状況

Least Concern

IUCN Red List

行動と繁殖

営巣

Nest type: PL. Incubation: 25-32 days.

一腹卵数

6-18

鳴き声

さえずり

Male produces a deep, purring wheeze; female gives a grating quacking series. Calls closely resemble Common Pochard; the female's harsh notes carry far across Australian freshwater lakes.

分類学

Kingdom	Animalia
Phylum	Chordata
Class	Aves
目	Anseriformes (Waterfowl)
科	Anatidae (Ducks, Geese & Swans)
Genus	Aythya
種	Aythya australis

Distribution

Hardhead has been recorded in 5 countries.

{# Distribution Map — simplified SVG world map with highlighted countries. Expects `country_codes` variable: list of ISO alpha-2 codes (e.g. ["US", "CA", "MX"]). Uses Alpine.js to toggle classes on country paths. #}

生息あり Not recorded

countries highlighted

🇧🇪 Belgium 🇫🇷 France 🇳🇱 Netherlands 🇳🇴 Norway 🇬🇧 United Kingdom

External Databases

よくある質問

What does the Hardhead eat?

Dives for molluscs, crustaceans, and aquatic invertebrates in coastal habitats; diet shifts between invertebrate types seasonally.

Where does the Hardhead live?

Deep freshwater lakes, rivers, and reservoirs across Australia and New Guinea. Nomadic in Australia, following seasonal inland flooding. Prefers deep water with submerged aquatic plants.

Is the Hardhead endangered?

The Hardhead has a conservation status of Least Concern.

How does the Hardhead nest?

Nest type: PL. Incubation: 25-32 days.

What does the Hardhead sound like?

Male produces a deep, purring wheeze; female gives a grating quacking series. Calls closely resemble Common Pochard; the female's harsh notes carry far across Australian freshwater lakes.

How big is the Hardhead?

The Hardhead has a wingspan of 42.7 cm, weight of 803.75 g.

What order and family does the Hardhead belong to?

The Hardhead (Aythya australis) belongs to the order Anseriformes and the family Anatidae.